How dare they care about their families, and want to their line to continue!
Unless they’re planning to get somebody to rape their gay daughter attacking the person they love, attempting to invalidate their relationship, making a point of excluding them from the legal benefits that could support a family if they consider the artificial insemination or surrogacy route, and trying to turn society itself against them so that they never know a moment’s peace and their life is a never-ending misery of pain and judgement with undue hardship piled on at every turn whose only escape is to submit to a different kind of eternal misery and deep personal violation hoping at best to become emotionally dead isn’t really going to improve the chances of that happening. And if they are everything you just said about caring about their well being is clearly a bunch of disingenuous bullshit you hope serves to manipulate the emotions of people who aren’t quite so lacking in emotion or basic decency as you while hoping they don’t actually think about the implications like I did.
There is also no shortage of kids in desperate need of adoption into loving families. You want grandkids? Then see the relationship between your own kids and their significant others is a happy and stable one free of duress or animosity so they’re comfortable adopting children of their own into a loving home creating a bond thicker than blood. Blood apparently meaning so little to you that your child is a sexual bargaining tool to service a name rather than the treasure whose happiness is irreplaceable. Maybe if you did that instead of trying to be monsters you’d not only get grandkids but they’d actually be happy to spend time together as a family and not cut you out of their lives entirely seeing you as a threat to them.
Love evidently means something entirely different to you people, as you can only see relationships as one of two deranged extremes: Utterly detached sexual gratification alone which you imagine as a pattern of addict-level hedonism consuming every waking moment prioritized above basic necessities of living or a means of producing children to continue a chain of obligation devoid of free will. Emotional bonds clearly meaning nothing in either case because you fail to grasp them at a fundamental level. You only understand shallow effect, adherence to norms even if it requires coercion, cardboard cutouts of love and family. You hypocrites make me sick.