You're wrong.
There's no way jackson gets better at shooting. Even if he does, tatums shooting is already years advanced ahead of jackson even as Tatum is younger
Look at kevin durant. He couldn't do 1 rep at the camp For 180 lbs as a rookie.
http://www.espn.com/nba/draft2007/news/story?id=2894925According to the Times, Durant was the only prospect at camp who failed to bench press 185 pounds, and finished behind Oden in some key drills, including the vertical leap, agility drill and three-quarter court sprint.
Oden jumped 34 inches in the vertical leap while Durant jumped 33½ inches, completed the agility drill in 11.67 seconds to Durant's 12.33 seconds, and finished the three-quarter court sprint in 3.27 seconds, ahead of Durant's 3.45 seconds, according to the report.
Now Durant is very strong and fast.
Meanwhile, the list of bad shooters who stay as bad shooters is longer than those who became good.shooters.