I currently have F-Droid installed on my stock phone and Google did nothing to stop me other than a single "unknown app" warning. Also, that's not how it works

I currently have F-Droid installed on my stock phone and Google did nothing to stop me other than a single "unknown app" warning. Also, that's not how it works with browsers. You have one browser installed. I don't think I've ever seen windows or mac (or any linux distro I've tried) ask which browser should be installed. There's just the default one and the choice to install anything else.