They should either change the verification badge to say “certified famous” or something, or just give out the verification badge to anyone who wants it, provided they successfully prove their identity. I don’t see how verifying my identity negatively affects Justin Bieber’s verified status, for example.
Perhaps there is a second person on earth named Justin Bieber? Then they might try to trick people. The blue check says “this is the one you probably meant”
You still have the problem of two famous persons named the same. It would be better to have separate checks. Have a check that means "this person showed us their passport" and another that says "this account is owned by the famous person mentioned in this news article".