You can boil the logic down and apply it however you want. The fact is that different people have different levels of tolerance for bullshit and VPN users are a large source of it. TOR is also inherently harmless but exit nodes end up on banlists everywhere because malicious users use them to the point that exit nodes are pre-emptively banned in a lot of places because some people just don’t wanna deal with it. The big email providers have a zero-tolerance policy for the same reason; if your domain misbehaves even once then you’re on the shit-list forever because it’s not worth playing whack-a-mole with malicious actors.