Why are forums a thing?

Genuine question.
Everytime I'm on here I see one of two things:
People over sharing their deepest darkest secrets or some dumb drama.
Worst part is, you can't NOT see it because the block button doesn't work.
And then YOU get in drama for blocking people because now they think you're one of the ops.
(This has actually happened to me multiple times on here, I don't even talk to anyone. )
Like what is forums existence for?
I've also seen multiple people say they don't want to make friends here, me included so, what's the point of forums?