RANT: what's the point of buying premium games anymore if Google can remove them from your library at any point?

I was a huge proponent of buying premium games because I come from Steam and there what you buy you keep forever in your library. Here in Play store everything was generally ok until a few years ago when Google started to be very strict about updating SDK so then first you get a block if you want to install games that Google thinks your phone can't handle it and in 8 out of 10 times Google is wrong.

Example: I play Combat Master and I uninstalled it last month only to see this month that apparently, I can't reinstall it because Google says my phone isn't supported - so I used apkpure store to install the game and lo and behold it works like a charm!

Next the huge problem is that Google keeps removing old games that don't update SDK - even premium games! Completely from your library!

Example: I had Animus Stand Alone and Smashing the Battle bought and recently they are not in my library anymore! Like WTF I paid for it and Google even deleted the record of me buying the game - like the game never existed!

So then what's the point of buying the games anymore? Convenience to download? Supporting the devs? Maybe the only valid reason honestly.

Keeping apks/xapks backups has to become a necessity apparently even if you pay for the games which is insane.