I have contributed to other projects without really needing to get involved in their community in any personal/parasocial level, though.

I just make a pull request and when the code was good it was accepted, when not it got rejected. Sometimes I’ve had to make changes before it getting merged, but I had no need to engage in discussions on discord or anything like that. I’ve been in some mailing lists to keep track on some projects, but never really engaged deeply, specially if it goes off-topic.

If I find that a good code contribution is rejected for whatever toxic reason, then the consequence of that is the code would stop being as good as it could have (because of the contributions being rejected/slowed down), so it’s then that forking might be in order. Of course the code matters.