I don't want to excuse anything facebook does that's bad and do take some effort to be less tracked. I have FB blocked in one browser profile and I have all but FB blocked in another and many other things.
That said, my experience using Facebook is mostly positive. I see what my sister is up to, my mom, my aunt, several friends and acquaintances. Facebook messenger is by far my most used communications service.
I have taken step to keep it that way. I get no news of facebook. I've joined almost no groups. I unfollow anyone who gets too political, that has included a couple of close friends who I want to follow but they jsut can't stop posting politics several times week or even day so "unfollow".
I run FB Purity in the browser can block a bunch of stuff but I don't have that option in the FB app and for the most part I don't notice too much crap in my feed.
In other words, AFAIK it's mostly a positive in my life and the life of my friends. If I worked at Facebook I'd certainly be proud of how helped people stay in touch and organize group events.
I'm not excusing anything bad they do. Just suggesting I suspect many people have a mostly positive experience or they'd quit.