I tend to agree. I never put too much stock into the mechanics mumbo-jumbo. I don't care if the pitcher's pitching motion consists of him putting the ball in his butt and farting it out towards the plate, as long as he gets up on the mound and produces, who really cares?
I think that a healthy knowledge of mechanics is good to supplement to other characteristics you can observe in pitcher, along with the stats. Personally, I just try to learn what I can about mechanics to just to deepen my understanding of the game. I do not, however, believe that judgement on a player should be based on the perceived quality of their mechanics.