I get what you are saying, but at the same time you also make the perfect case for taking a kid, RS him, as we shouldn't need him right away to produce. If that is the case, don't you look for the kid with the absolute best talent ceiling long term? Not the kid who is more polished, yet doesn't really have a super high ceiling.
Just throwing it out there, but you gotta take that into consideration. As JH pointed out about the Sudanese players. They continue to develop, they have a good body type to build on, and he has family that plays in the NBA at a high level.
I trust in Fran's judgement, he has an eye for talent, and he knows how he wants to use his roster. If we signed Jok, I would be excited. If we sign another kid, I will be excited about him also.