IMHO Olynyk is about a thousand times more skilled than Bass.
7 footers with a nice shooting stroke AND a skilled post game don't come along often - much less ones who also have excellent hands, great passing skills, high IQ, and well above average ball handling.
Perhaps. However, 7-footers who move like they're stuck in molasses and get pushed around like rag dolls typically don't last long in the NBA.
Fab Melo, Joel Anthony, Kendrick Perkins -- these are bigs who move like they're stuck in molasses.
KO is no Thaddeus Young, but he certainly isn't deserving of your description of his mobility.
There is no sense arguing with the stat geeks. They have stats for everything and stats rule the world today. I honestly do not know why teams bother playing the games anymore. Just plug all of the nifty stats in the computer for each game and see who wins.... 
Stats are problematic if they are regarded as the beginning, middle, and end of the discussion of a player's value.
However, stats are very useful for identifying viewer bias when they're held up to subjective impressions of a player.
In some cases, it confirms that a player is not actually making that large of an impact despite some highlight plays or games that stand out (Green).
In other cases, the stats demonstrate that a player is making more of a consistent positive impact than many are willing to credit him with (Olynyk).