Just as a counter point, almost every young (pre-NBA) guy who's gone overseas to play has said it is a far more difficult experience than they could imagine. Way more factors than just playing basketball--language, culture, living, dealing with adult teammates fighting for their jobs, unsympathetic franchises, lack of support, different style of play, not necessarily a ton of focused individual coaching, etc. Not easy for a young guy with no real life experience. Ultimately, it probably makes them tougher, but most of these guys had no choice. If they did, I'm certain all of them would have attended or stayed in college. That's from their mouths, not mine.
