First, I'm not looking at dunk contest for athleticism. The trick is to be able to explode in game conditions, moving at angles. Don't care too much about how high a guy can jump.
That said, Fultz is definitely athletic enough. And his change of pace, and change of direction are off the charts. He's incredibly slick and sophisticated for some his age.
I think those clips showed some of that. It might surprise you but I could care less if you didn't want to see a dunk contest. Jumping is a component of athletic ability, it is an important one for basketball but certainly not the sole one. But the NBA combine tests several kinds of leaping, and if it was not important would they do this?
Guys in the thread above mine were questioning his ability to jump. These clips proved he is fine in this regard. One has to jump on one's jumper , layups and dunks. One has to jump on D to block shots and threaten guys on defense. They also test in the NFL.
The vertical jump at the NFL Combine measures a player's ability to get off the ground, but the importance of the test goes beyond the ability to jump high.
A player's reach is measured before the jump and the prospect then jumps flat-footed to hit as many flags above them as possible. The player is then given a second opportunity to hit more flags and best his previous jump.
While jumping ability is nice and the ability to win jump balls in the end zone can depend on your natural jumping abilities, the value of a strong vertical jump is that it shows a player's ability to burst off the line of scrimmage with lower body strength. That makes it an especially important statistic for lineman, who have to surge off the line with power.
http://www.sbnation.com/nfl/2014/2/22/5406040/nfl-combine-2014-drills-vertical-jumpScouts think it is important and two professional leagues think it is important. I concede it is not the end all but I think I will go with the NBA and NFL and scouts over the likes of you, no offense.
I would imagine this power could translate into the first step that some thinks he lacks.