Not a bad call. If you don't think you can get to the mountain top, and are doubting your drive. Best to get out. This is an all in sport. If you're not all in, you're going to get damaged. Get out early, and get to work on the next chapter in your life early. There's still time for him to find successes elsewhere. Hopefully he sticks to it. Doubt a come back in a few years would go well, if he's not making any progress in his early prime.