The assumption that a detailed understanding of the causes of a problem is required to observe that there is a problem is a false assumption. Your objection and line of argument here have no merit whatsoever.
Taysom tends to side arm the ball and throws off of his back foot fairly often. He also overlooks/doesn't see open receivers down the field or in the flat fairly often, usually choosing to run instead. I'm actually not sure what you are trying to get at by asking why he does that. Do you mean psychologically? Existentially?