NBA guys get open because they space the hell out of the defense by being able to nail NBA distance threes.
The NBA used to bore and bother me, but in time I realized that most of the things I didn't like were products of the players just being too good, not lack of effort. It's just a different style. I prefer a high level college game, watching RU sometimes makes me want to stop watching basketball altogether but I love me an NCAA tournament game with a great college player or two on each side. NBA, some of those guys are too automatic for my maximum enjoyment but it's often great to watch these guys work. Only four things about the NBA still really annoy me, one of which (as someone pointed out here) has filtered down into the college game.
1) players who leave their feet for a shot and decide against it and pass the ball out before they hit the ground
2) lack of effort for rebounds and loose balls
3) James Harden
4) most endgame shots are ISO, where some of the greatest players of all time throw up some of the worst shots of all time (looking at you Kobe)