>It makes sense that a toxic environment will turn off people in the long run, and most well intentioned people (ie the majority of Reddit, Google, or FB employees) want to run a platform that adds value and is not a cesspool.
I don't think this is supported by the evidence.
The evidence: the current state of Twitter, Facebook, etc. None of them have the necessary level of moderation and until they do, they will continue to be cesspools.