You can already completely compromise the average user's privacy with an underprivileged process (nearly all of your personal information is accessible with zero privileges!), and you can already persist with administrator privileges (that is routinely given on Windows).
In regard to the "RCE attacker risk", attackers can RCE to escalate just as easily into vulnerable Windows services (there's too many to count). Kernel drivers aren't that special.
In regard to the "CrowdStrike risk", that's not privacy related and is extremely overblown.
What exactly does a kernel driver change regarding privacy? Nothing I can think of.
It's this simple: If games want your personal data, they don't need a kernel driver to get it.