Play Integrity certifies (and banks/etc approve) that Android 8.0 (oreo) unpatched for several years, full of vulnerabilities for RCE, 0-click, privilege escalation, etc, so full of holes it's trivial to get a root and then hide it (or use leaked cert), is absolutely a-ok, safe to use and secure for user.

Yes?

Is this what you're suggesting? :)

Because this is what's certified and embraced.