C.C., it's a "purpose" thing. I guess most folks regard a range session as a learning process, or load testing, or sight-in. Burning off a bunch of ammo in a short time, to me, is merely turning money into noise. I've done that sort of thing, occasionally, with a .22, but not with what I'd call a "serious" rifle. It's always struck me as a waste of money...
I'm not gonna tell anybody, "Don't do that!", but I'd just as soon not be around that when it's going on.
Knob Creek is a different deal. The intent, there, is to turning money into noise, for folks who can readily afford it and thereby be entertained. Sorta like car racing.