Why are the table coaches always the loose passives?

If you're honest with yourself you will realize that 100% of table coaches are tight, though not nescessarily "tight-aggressive". I have never seen a table coach that was loose. I think the reason for this is they know just enough to play tight pre-flop (and probably suck postflop)and probably are making a big deal of the fact that they have memorized the starting hand rankings.