It's gone so far that even tech people now think that having root access to a mobile device is somehow scary. Well guess what that root access is still there for the manufacturer. It needs it for stuff like updates. It just shields you from having any kind of input or visibility on what is going on.

And once you've given up your admin control to the mega corporation, your government is going to be next. They'll be demanding backdoors and regulatory bullshit like age verification and snooping backdoors. Even today the EU launched yet another chatcontrol proposal. Eventually they'll manage to get it through when they've paid off enough representatives.

Keeping full control is the only way to prevent this.