That doesn’t prove anything. There’s no proof that the person currently using it is the same person as the person who created the account.

By the way, you might also notice this argument also works against age verification systems where the user’s age is verified only once. Unless you intend to check their identity every single time they log in.

Age verification is just a ham-fisted way for the state to try to take over a role that should be exercised by parents. Parental controls exist, people!