I wanted to follow-up on a couple of the five players you mentioned using NBA Draft Net as a source.
Cam Payne scored a 7 in the athleticism category in their draft mock analysis.
Jevon Carter scored a 7 in the athleticism category as well.
Yet Devin Booker graded out an 8 in athleticism using the same source.
There are other categories to consider such as size, defense, strength, quickness, leaping ability, leadership, jump shot and ball handling. Athleticism can't be viewed in a vacuum.
https://www.nbadraft.net/players/devin-booker/
https://www.nbadraft.net/players/cameron-payne/
https://www.nbadraft.net/players/jevon-carter/
Carter and Payne probably scored that low because they have elite quickness but nothing else. They are Saric-like in terms of inability to get off the ground. They are also clumsy with the ball in their hands, which is probably why they were scored so lowly on quickness as well, despite the fact that both have far more speed for their position than Booker does. Booker is just average or below average across the board athletically. He has elite skills and unparalleled craftiness, but he doesn't have elite anything in terms of pure athleticism.