Yeah, but it's important to remember that many youth watchers think a positive contributor in the youth ranks, is an exciting prospect. On the other hand, it's different with the actual best players of the youth team. Whenever I talk about youth talents, I always make the distinction because as your correctly stated, many youth players struggle to show it in men's football. It's not good enough that they are merely good in the youth ranks, you really need to be the best of your group to have a chance. Not a guarantee, but to have a chance. I think many posters on our forums and on social media make that mistake. Sometimes, there is just a really talented crop so instead of just the best player I'm willing to prop up the 2nd or 3rd best players too, as long as a comparison is made to past best talents.
Our former best players are Ravel, Pogba (2nd best talent), Januzaj, Wilson, Rashford, Gribbin, Gomes, Greenwood, Garner, etc... That's not a bad list of players to being able to make a positive contribution in men's football. Out of that list, only Ravel, Wilson, and Gribbin failed to make the step up. The other players have been able to prove they can play in a top 5 league and in Garner's case, still an ongoing journey.
Hannibal was always a top talent, hence why we paid 10m for him at age 16. He doesn't lack technical ability. As he comes to terms with the quickness of top flight football, he will start to show more of his talent. This isn't a McTominay situation where there is nothing at the bottom of the well. The biggest deterrent for Hannibal will be coming to grips with the quickness, something most young players have a hard time dealing with initially.