No, I don't agree it's the norm. There is though a general tendency to opine with strong views on subjects posters have no expertise on. I think that's because many are software engineers (or equivalent) and they are used to being expected to "wing it" on whatever technical subject comes up. On the other hand you can always find informed comments by users who have specialist knowledge.

And there's plenty of pushback on here about the chess thing besides your very valid points.

EDIT: anyway if I can offer a bit of unsolicited advice, it won't do you or anyone any good to accuse everyone who doesn't agree with you of laziness, even if you can see e.g. they haven't really read an article. Just say the thing you wan to say and let them figure it out. Most people will appreciate that much better and you will feel better about yourself for acting like a mature adult.

It's even in the site guidelines:

Please don't comment on whether someone read an article. "Did you even read the article? It mentions that" can be shortened to "The article mentions that".