Yea but the thing is you are making up and arguing against a situation that doesn't exist. If we were stacked at wing and RHD, the rankings would still look about the same, if we were in desperate need of a C and Slaf was ranked number 2, I would hope you would be arguing the same thing in reverse. "You take the wing because he will be the best, not Cooley just because we have no centers." Then it would actually make sense.
It's a convenient coincidence that there are 3 guys we can choose from who could all realistically go #2 that also fill a need.
You seem to be under the assumption that all this Slaf/RHDs talk is solely based off needing those things, and not because they are potential star players projected to go in the spot we are selecting.