well i'm glad someone else agrees that that guy made no sense.
but anyways, yea I practice my house, but I don't throw it. There's quite a bit of windows and one slip up would be death at an early age. I usually just practice my motion, and outside i sometimes throw it at a fence, to kinda judge the feel and movement of some of my pitches.
I don't know, maybe I can find a place that would be good for throwing and not having to go pick up my balls every couple minutes.