If this isn't referring to the Git CLI that prompts the user for username and password for a GitHub remote repository and GitHub rejecting password auth, then disregard this rant.

Git and GitHub are two seperate pieces of software. Git is the local client that does all the work and can optionally sync with a remote repository that can be stored in GitHub or GitLab or any other compatible remote. When Git asks for a password to authenticate, it has nothing to do with GitHub. GitHub then rejects that authentication method that Git provided because it believes that the method is insecure.