I'm aware, and I'm choosing GOG when I can now, though even then I see phoning home (or attempts to) happening (opensnitch is useful for that https://github.com/evilsocket/opensnitch) - I've paid for some titles 2-3x over which is frustrating, admittedly I don't have the physical media from the first time which is on me, but it's frustrating seeing single player games wanting to phone home

Steam's DRM is entirely optional. It is up to the game publishers to use it.