Yeah, you can teach getting a better shot, that is part of what I meant when I said scheme and what you’re asked to do can help. Are you asked to be the team’s main scoring threat and put yourself in a position where you end up taking difficult shots, or be a complimentary piece.
You can also teach better footwork/balance, hand placement and mechanics on the shots you do take. Which should lead to improvements unless players are at their ceilings. Most college players aren’t at their ceilings.