You continue to use strawman arguments, stop it.
No one stands on the mound saying "I need extra spin on this pitch". That's absurd. What pitchers actually do is spend offseasons trying to nudge that spin rate up through physical conditioning, altering their grip on the ball, and, yes, sometimes cheating. Why do they do this? Because adding 100rpm to a pitch makes that pitch move more. Making a pitch move more makes it more effective (most of the time, anyway, provided the pitcher can control that movement). The more spin on the pitch, generally, the better and more deceptive said pitch becomes.
Please argue the points we're making honestly or I will remove your ability to post into this thread.