The problem with centers is that it almost makes no sense of training them in range, passing, outside defense... because its either unnecessary or extremely slow to train.
If those "well rounded" players were that superior to monoskillers we would see more of them, so I guess either the users are idiots, or the upside of a couple of skillups in tertiary skills is marginal at best.
As I said before, we cant field five LaBrons...