I have a very old account that I still use for some email forwards to my main account. Even though I can verify all the other requirements, since I haven’t logged into that account with a machine it recognizes that I still have, apparently I will never be able to log into the account. Literally nothing can be done because google would rather take the easy way to handle this.
When the account is locked out, after a set period of time, Google can do whatever it wants with such data without limitations. The number of locked out accounts, in which Google has and could totally and fully exploit, is likely staggering and beyond what many can imagine.