I’m sure I’m not the only contributor they pushed away

Yeah. I found myself not adding a potentially useful comment, more than once, due to reputation restrictions on a SE community despite me having enough rep in the ones I regularly use. And I am one of those that aligns well with the Question & Answer style format of their site.
So, I just leave, knowing that - some answer is incomplete - or - some question is not worded well enough to attract the correct answerer. I prefer suggesting fixes to the question rather than changing it myself, which would otherwise be assuming that I have understood correctly.