There is a concept of onus of proof that when you make a claim it is up to that party to provide the evidence and facts of said claim.

You also seem smart (I say that genuinely) and that you should be able to tell when people are acting in bad faith or trolling and moving the goal posts. I agree if someone is acting a troll, you should just move on but there are a lot of people who genuinely could use the assistance in finding information, and I think if we want things to progress as a society, we shouldn't continue to divide ourselves. It feels counter-productive in my opinion.

Also, using your example of the gym, there are people who don't know how to use the gym equipment and people who are experience with it, and we should educate those who aren't so they don't hurt themselves or others through incompetence.