Would you rather have a player who shot 38% from 3, but the majority of their makes and attempts came from the corner, or would you rather have a 33% shooter who converted 38% of their above the break 3's, but struggled to an unusual degree from the corners?
Because the corner shot is generally regarded as the easiest, and if a player has exhibited the ability to make the tougher shots, the common sense take would be that you can more easily teach a player to be proficient in the easier shot than you can the harder shot.
Combine that with the player being proficient in the mid-range on difficult shots, this is the profile of a good shooter who can easily scale up with reps. Shows how powerful narrative are in regards to prospects. Someone saw JHS, labeled him a bad shooter and it stuck despite it being pretty far from the truth. The bummer with JHS is that he has a small sample size on his FT attempts (litterally if you take out the first game of the season where he went 1/4 he becomes an 81% FT shooter, just to show how small the sample is). If he was an 80%+ FT shooter on more attempts I'd feel more confident in projecting his shooting growth, but it isnt so there is still somewhat a question as there is with most prospects.