This is a neat hack, and I don't want to diminish the effort. But I fear that any such loader apk would be marked as malware by Google and nuked by Play Protect Services.

And as others mention, using adb (or Shizuku) might also be a workaround for tech-savvy users (for the time being). We list some other potential temporary workarounds at https://keepandroidopen.org. But none of it is viable for the other 99%.

There's really no solution to the dilemma other than stopping Google from implementing it altogether. And for that, we need regulatory action — which means we need to advocate and educate consumers and lawmakers about the threat that this poses.