It is. But you can't treat people in a way that is criminal, regardless of how they act. Therein lies the the fault with victim blaming. I know you said devil's advocate but this ought to be intuitively obvious? You can perhaps rightfully call a child a slut (but you won't be a nice person for doing so), but that's about as far as you can go. You can't rape her and then justify it as "well she acted like a slut so I treated her like one".
It's illegal to rape women for being promiscuous.

There in lies the problem with modern society. Because girls who act and dress promiscuously, sometimes also engage in sexual activity with older men. It's also illegal to have consensual sex, and the responsibility is thrown entirely on the adult. Controlling sexual urges during a consensual encounter is a lot harder than people think. It's not only in our genes, but also embedded in our society. There is a reason why so many people cheat when they are in a relationship. But there is a fundamental difference between wanting that ultimate please with someone and willing to break the law/relationship over it and going as far as knowingly hurting them for it.

Sometimes the adult may not know the true age, sometimes the adult will give in to temptation. But the thought process going through a man's brain is entirely different from a "I'm going to rape her" situation. Yet the punishment and branding stays the same, especially in cases involving minors.

200 years ago it wasn't uncommon to get with someone younger than 18. In fact, nature itself makes girls ready in the 10-13 age. Now I do agree, that in this day in age, getting pregnant or even engaging in sexual activity before 17-18 can be damaging, because so much of our future rides on our ability to focus on learning during our teen years and our ability to grow up with a healthy mental state. But we are fighting against our nature in doing this, and the fact that society has deemed it ok to punish those who break this rule but at the same time deemed it ok to leave all the temptation in there is wrong. It's similar to bringing alcohol to an AA meeting. In either case you have to be very strong willed to go against your natural instincts when being tempted, and some people just aren't.

No, girls that young giving birth are risking a whole host of medical issues. Nature makes girls capable by 13, it does not make them ready.

I'd have to research this more to find any kind of correlation between a healthy 14 y/o and a healthy 18 y/o as far as risks to giving birth. Again though you are right here and what I meant by ready was capable. But it would be wrong to state that all girls under 18 are unfit to become parents, or are at larger risk than if they were 18+. Those girls whose bodies develop and mature faster are also those who seem to favor promiscuous clothing as well, and as also more like to want to consensually engage in sexual activity. Therefore it also seems plausible that men's natural attraction to females happen when they think that female is ready to give birth regardless of age.

Honestly, I don't really see this happen all that often. Most cases of pedophiles (in the news at least) seem to be of either people who abused positions of trust (might as well be forcible rape) or predators who groomed little girls for sex (pretty much is forcible rape). But I acknowledge that could well just be my perspective. My position though, is that there's no reason why you can't wait a couple of years with an underage partner. Err on the side of caution when it comes to people who are potentially not ready.

I agree here, but I do occasionally read about a case of statutory rape that just doesn't seem to make sense. There is also a huge difference in being attracted to someone underaged that looks, talks, acts, dresses like an adult and an attraction to the looks, talks, and acts of someone who is clearly still a kid.

Edit: this is why I think society is partly to blame. We should keep children as children, so that people are less likely to be attracted to them even if they somewhat look old enough. Nothing more offputting to me than a girl who acts like a child with her mannerisms, despite how old she is.

Well the law does have to make up some number, but it's sad to see people automatically branded as pedophiles and rapist (not the legal definition, but that of purely forceful sex) when the parties involved can be one of the numerous cases when the sexual act in question is not damaging to either party. Especially when both parties are wired perfectly normal and subject to society's teens' provocative displays and their own sexual impulses.

I take issue with trying to blame it on provocative displays. Really, human adults in general aren't such hopeless creatures who can't control their base desires.

Don't agree with this at all. Just look at how many people commit crimes of passion, and how many people are addicted to drugs, alcohol, or smoking. Look at how many people eat without control, or spend way too much time on entertainment to their own detriment. Human adults in general have a very hard time struggling with control, specially when having that control isn't specifically rewarded in any way.

I don't think any of the other little vices that you mentioned compares to sexually assaulting a minor.

Oh they don't! I was referring to being able to say no to sex with a minor who looks,acts, talks, and dresses like an adult who is the one wanting to initiate the sexual act in the first place.
Sexual activity in men in my opinion is almost equivalent to a drug. It is why the porn industry is so damn huge. Sex is not one of those things men can just shrug off and be 100% in control about, because on some level sex is a primal instinct embedded in all of us. Look at how hard it is to become a celibate priest or monk, and they already remove themselves from situations where they can give in.