[ChrisV]

Well, because you're calling for 1/16th of your stack. If you make or call a pot size bet on the flop, you'll be in for a quarter of your stack. That isn't really my definition of deep money.

More to the point, most of the time you don't flop a flush or two pair. Instead you flop horrible stuff like QQx with a flush draw. You can then either sit there bleeding chips by calling, in which case when the flush hits it'll be blatantly obvious what you have, or you can use your kamikaze option of raising heaps and praying they don't turn out to be slowplaying a Q.