Oddbean new post about login | logout No play protect does not automatically uninstalls all apps installed outside of play store. It's supposed to only uninstall malicious apps, and robosats ain't one - and that's a problem.
They are probably using certain flags to determine potential or likely maliciousness. I doubt this is as insidious as some of you are making it. Don't use Play Protect if this is really that big of a problem. Systems like this will never be perfect in a world with so many applications and bad actors. Some good software will inevitably be caught up in the net like this.