1) Because it may mean you're ignoring some prodigious talents who can't "dribble, pass, shoot, and drive." Rather than simply drafting the best talent available and figuring out how to best utilize those talents within a system that you adjust to fit the talent, you're instead constantly searching for players who fit a pre-determined system, and rejecting those who don't. Even if the available players who can do a little bit of everything aren't actually as good as other guys who are available. So you pass up guys like Jokic, Gobert, and Vucevic. Klay Thompson had poor handles for an SG, rarely drove, and really wasn't much of a passer either. Giannis is a crappy shooter.
2) It also has no mention at all of players who can defend. Very college-like to worry only about offense, and count on your defensive system to be good enough regardless of your defensive talent.
Because you're never going to be able to get that -- nobody ever does. Even GSW at their greatest didn't have that. A good coach is going to want some players who can't do all those things, will figure out how to best take advantage of the talents they do possess, and will want to hang on to them. The idea that we're going to reject players who don't fit Beilein's particular vision of what amounts to positionless basketball is foolish to me because it inevitably will lead to overlooking some more talented players.
