Yeah, this is infuriating. When my eldest son was 6, he was an amazing shooter. He could knock down elbow jumpers like they were nothing. This was how we trained:
a. I rebounded, and passed him the ball. He caught it and shot immediately.
b. I would put him on one elbow. Then I would pass the ball to the other elbow. IOW, simulating an off-ball screen to a catch-and-shoot. He would take a slight arc when moving from one elbow to another so he could catch the ball, square up and shoot in basically one fluid motion.
If I could have my 6 year old shooting game situation reps (as much as possible at that age), surely EC could find a way to do that.
My son caught the attention of some coaches, and he caught on with a travel team coached by a former NBA player. I used to joke that I wanted him to be good enough to play at Northwestern. I doubted, from probability and genes, that he would be good enough to play at a good DI school -- which would rule out a lot of quality educational institutions such as Stanford and Berkeley. Ivies don't give athletic scholarships. But Northwestern seemed like a realistic dream. Turned out not to be his dream for reasons, and that was fine. My goal for him at age 6 was to open as many doors for him so he could walk through the one he wanted.
But the point is: practicing game rep shooting literally starts at a very early age. The travel team used to do game rep shooting drills too.