And the thing that really disgusts me is the implication that, if you have the skill to play an 88 note piano keyboard, you apparently don't have the skill to play a 'proper' arranger!

The truth of the matter is, generally, pianists have MUCH better playing abilities than arranger players do (I've listened to enough one finger melody, no improv, no skill arranger demos here to know this!), and probably could use a much better arranger if offered one..!