What's preventing big men from bending their knees at the FT line
A lot of them are strong AF and their hands are too big to precisely control the spin of the ball.
Shooting power comes from the knees, then up to the hips, then up through your shooting hand.
One arm just helps transfer the energy to the wrist extension for spin, and the other is used for aim.
They minimize knee bending to help them not just throw the fukk out of the ball. Imagine you’re shooting a tennis ball at an 8 foot rim.