You could honestly take this the other way and say that because the incoming players have all been taught/encouraged to shoot, it is way less likely that they can't shoot because they haven't had good training. For example, a guy like Brook Lopez likely could have always been able to shoot....but he was only encouraged to do so later his career. But if he was born 15 years later he would have been shooting 3's his whole life. So there may have been an initial bump in guys who just started trying it out once they were in the league like Brook, but I don't know if that's relevant to current prospect who are much more likely to have already tried to shoot 3's. There are still some cases of guys who weren't told/taught to shoot, but that number has to be lower than it was before.
It's all relative as well. The shooting standard keeps getting higher and higher and I think most would also say that the importance of shooting is greater. All of this is just to say, I don't see a reason to feel more optimistic about bad shooters. I don't want this to come off as me saying we shouldn't draft bad shooters or that they can't improve. I just don't see the evidence or rationale to see why they can/are improving now.
