I don't really have a dog in this fight. This thread is about Looney. However, here are some quotes from respected coaches about player development in a shooting aspect.
"Kids don't develop skills in summer (while on high school). They play a lot of games, but they don't work on their shooting. The amount of time it takes for a player to become a good shooter is hours and hours every single day. Kids aren't doing it anymore." -Jim Larranaga
"The skill level of players is really low. You have to work on (ball-handling) skills, footwork and shooting technique before you can teach a player your system. No system is effective without fundamentals." -Jay Wright
"There used to be a lot of stories about people shooting in the summer, but guys are now more interested in getting to the basket and dunking. We work on shooting more than ever before. We recruit guys who are great athletes, but they can't shoot." -Jim Boeheim
"Kids are coming in with lesser skills and also aren't stickin around to develop them." -Frank Haith
All these quotes are from the new Athlon mag. It is well-known that "skill camps" will teach a skill for a week, but it takes development to make it last. More coaches than these will say the same about a lack of skill and their responsibility to develop talent. The combination of personal motivation (player) and intentional guidance (coach) turn a good player into a great one.