I don't disagree with that, obviously, my point is what if you have one that is not very good at those things? Then you may as well just put another 6'8 guy on the floor that can make plays .. rather than a much smaller guy that can't. Just saying sometimes we try to hard to find someone on a team to play a certain role when that person doesn't exist .. then you improvise.
Well if you have a back-court of a bunch of 6'6 and taller guys, you are going to have a hell of a time guarding the opposing team's PG.