Reddit is a huge danger to society. There's no doubt that subs about specific non political (and non popular) topics are hugely beneficial, the overall damage the echo chambers do still outweigh these benefits.
Well, now that it's becoming "the community source" for LLMs it's becoming even more of a target for large-scale manipulation.
The way the voting system works at Reddit encourages group think and bubbles. All it takes is five more down votes than up votes and a comment or post essentially disappears from view. It's a design that actively avoids debate.