The point is that YouTubers pay for that with their own reputation, if I followed a YouTuber that promoted exploitative companies I would stop following that YouTuber - why would you want to watch their content anyway?
Using Fedora Silverblue has gone a long way to dispel that concern for me. It goes out of its way to be much more user-centric than that. I can’t speak for the others yet.
Well, almost the opposite of you, I currently use Fedora Silverblue (including BTRFS which I very much appreciate for versioned backups), except that I override GNOME Software (never got it to work properly for me) and Fedora’s Firefox (I use the Firefox from Flathub but not Fedora).
It’s not the advertising that’s the problem, it’s the tracking and surveillance that comes with it. Until they get rid of that, uBlock Origin is a necessary security measure.