because Mozilla, the foundation, is hostile. it's a political money grab.
with telemetry they can justify whatever. they can go to the board and say "look people are clicking more on pocket, which we put prominently on the UI against everyone wishes, and they barely use bookmarks, which have critical bugs open for over 20years... who would have thought of this counterintuitive insight if it weren't for my genius persistence on trying and measuring new ideas uh? so are we good on the extra bonus to my close childhood friends?" ...see, it makes the pitch defensable, if you don't say the right parts out loud.