I know why one top contributor left (cancer) and I heard the same about another. I haven't heard what you say about any, except in sweeping statements like yours.
I can think of multiple users offhand with 500k+ rep that I think are more damaging to the site than any newcomer ever could be. (No, I will not name names.) And I previously showed you a link of someone with 60k+ rep (slightly more than me) who went 14 years without even trying to use the meta site for anything and demonstrated a complete failure to understand the basic standards for questions.
