The problem is that all those forks are beholden to Mozilla's corporate interests the same way the chromium derivatives are beholden to Google's corporate interests. What we need is one of the newer independent engines to mature - libweb, servo or blitz.
How are they beholden? In the sense that it's hard to provide engine updates without the funding of goog?
edit: also, by "libweb", did you mean "ladybird"?
You can read this as, "I want Mozilla to spend millions developing a competitive Chrome alternative, but I want it for free and aligned with all my personal nitpicks".
Typical freeloader behaviour, moans about free software politics but won't contribute anything themselves.
No they're not. They can pull what they like and not pull what they don't.
Librewolf is trying to be de-Mozillaed, privacy-enhanced Firefox, so it'll probably take whatever not-overtly-spyware patches Mozilla adds. Some others, like Waterfox and Pale Moon, are more selective.