You can be a superstar teenager and have your head screwed on straight and be professional. It's possible. You wouldn't catch a mature-as-shit Mbappe doing anything like that in his teens. It's ok being level-headed on the field, but off the field if you want to be the very best you can't rely on your talent. I know folks will play this down, but Mason needs to get into his mind that his off-field choices will have footballing repercussions eventually.