I think it started with Mikan and Wilt, and they'd just literally camp out under the basket (the lane was like half the size it was then) and dump buckets in. I guess, obviously before my time.
As for the NBA; I don't think anyone is saying it's pefect, of course it isn't. KG fouls all the time, moving screens, just grabs people, etc, and it's not just him. But the game is more aesthetically pleasing to me than college, both because the players are better and also because it's more wide open.
There is something to his, probably. The season is so long, there is so much traveling (to games, not with the ball, though that also) that its inevitable you'll see some of that. Also the scouting is so intense and deep that everyone pretty much knows what the other team runs.
As for the mid-range thing; I've mentioned it before, but it really isn't a high percentage shot. Even at the NBA level, with the best shooters in the world, the average on 10-15 foot shots is 42%. 16-23 feet is 38%. It just doesn't make sense to take a lot of those shots. The league shoots 64% at the rim, and 54% on an effective basis from 3. Why would you try to get more 40% shots at the expense of 54% shots?
There's a place for midrange shots, to open up the floor, make the defense guard everywhere, but they shouldn't be a staple of any offense. Very few guys are good enough to make it worth it. (Kevin Durant is 64% from 10-15 feet this year. He's obviously a freak)