I don’t think there’s any sense in overlooking flaws just because something is overall better. Firefox is the massively better choice if the goal is to avoid data collection. However, I don’t think that means it’s fair to let things slide so easily. A community that calls out its developers when they make a mistake can ultimately improve things, and prevents devs from saying “they won’t understand and they won’t care.” Firefox isn’t a total angel when it comes to data collection, I mean telemetry being opt-out instead of opt-in is a pretty big boon, even if it’s not as bad as it is in other browsers. I’m not sure what agenda you believe is being pushed here, I never once suggested folks jump ship from Firefox to Chrome.
I love Librewolf too, and if you’re looking to explore other options I do recommend giving the Mullvad Browser a go. It’s another firefox fork but I believe it handles fingerprinting in a better manner. Similarly, it comes with uBlock Origin built in but also NoScript. I’d likely use it as my primary browser but I don’t really care for NoScript and removing the extension would ultimately defeat the fingerprint resistance of Mullvad.