Because of this. If we're at the point where you need to get permisssion and approval to verify that the platform you're using is acceptable, then the gates are up and the free web is no longer free at all.
I guess it has been the case from the good old CGI era? I do remember all those private forums that required me to wait for several days until they can "verify" my identity and "approve" my registration. The control always has been at the hand of platform. The difference is that now attacks are much more sophisticated (GPT-4 powered!), while defense line is left at a pretty miserable state.