I can’t comment on beehaw specifically, but I do know I’ve seen it rise in popularity on Lemmy / The Fediverse, just as its generally prevalent on the internet itself (that’s the core of the problem, its not really a Reddit thing as much as it is an “internet” thing from what I’ve found).
Like you, I don’t mind debating something with someone when they attempt to do so in good faith - or if I post something incorrect then I’m happy to be corrected if someone isn’t rude about it. I do also try to make sure that if I post something, that I’m either sure its correct, or I provide some sort of hint that I’m not 100% sure about it.