@K
There are several cases of someone presenting a hypothesis that they then basically back up with an insistence that it requires faith. You've heard of almost none of those, most of them you have through here.
But yes, granted, any hypothesis that has ever received much support, and actual confirmation, was never presented with anything resembling "you just have to have faith that I'm right." Always it's been presented as "these are my observations, and the results of what experimentation I've been able to perform. What do I have wrong?" And that's the real key to the advancement of science throughout history, truly successful scientists have always asked what they had wrong. The major theories that have done the most on their own to lead to great advancements of our knowledge have had very little wrong, but that's a bit of luck on top of using dozens if not hundreds of other people's research throughout history.
Even Einstein's Theory of Relativity, both Special and General, involved his study of multiple research projects over the previous hundred or so years at that time, including Maxwell Clerk's calculations of the speed of light based on electromagnetic propagation properties of various materials . . . and vacuum . . . as well as Michelson and Morley's experiments with the speed of light to test for the existence of the lumifinerous ether. Spoiler alert, they found that it probably does not exist. Further experiments over the last 100+ years have well confirmed his hypothesis, in most circumstances, and the only times it's broken down is because the experiment was flawed, or they were attempting to deal with subatomic particles which don't seem to follow any previously known laws of physics, or at least can't be measured properly because they can't be directly observed anyway. In fact, the crazy antics of subatomic particles is the reason for the almost concurrent theory of quantum mechanics.
Quantum mechanics, again has been studied out the wazoo, much of the initial hypotheses pretty well confirmed, and expanded upon . . . and in fact without it modern computing wouldn't exist, as we'd still be using vacuum tubes. Yes, that's right, solid state electronics, based on diodes and transistors, were developed because of study into quantum mechanics!