Isiah Thomas Job was a Test?

I just dont get why people think great players
should make great coaches. Some of the best
coaches were rather mediocre college or
pro players that had to get by on smarts, not
athletic ability. They had to find some way to
keep themselves on the court, they had to actually
think about the game.

Some coaches do no teaching.

Isiah: Stop that guy from going to the basket, he is killing you.
Player: How coach, what do you suggest?
Isiah: Be quicker.
Player: Thanks coach.