You are not making any sense, and you avoided my question earlier so Ill ask it again:
If he "needed" to prevent someone like Blackbeard from becoming PK, why wait years and let Blackbeard amass power?
He didnt even fight Blackbeard to get the scar by the time Roger died, so why tell Buggy he's not going after One Piece yet at that point?
Oda still isnt even saying which Pirate Shanks was discussing with the Gorosei, just an FYI. There is misdirect there for a reason.