I don't understand the concept of shaving brush. Your hand doesn't work?
My hand is not covered with fine quality bristles which are soft yet flexible and retain their shape. Thus, my hand is not capable of softening and raising stubble to promote a smoother and closer shave.
On the subject of shaving… why do ppl shave with the grain? I find I only get a decent shave if I shave against the grain, easier and less painful (as in no pain), too.
If you'd used a decent brush first, you'd get a decent shave without going against the grain and would thus not be punishing your skin and risking shaving rash and ingrowing hairs.
Come on man, I shouldn't be having to teach you how to shave at your age!