What do you mean you win their castle. You mean the rook?
Also they dont play it because generally it is a horrible opening and you won't checkmate anyone over 600 or 700 with it because its so common.
also grandmaster correct me if im wrong dont move their queen out to early
in some openings you move you queen as early as move 3 (and is sound)
This is like asking "why don't GMs do Fools Mate as black" because your just assuming their opponent will play 1. f3 2. g4
Yup
please understand humor
thanks
maybe they just don't get it
They aren't playing it because super computers have found a very strong counter:
with a very small advantage to Black.
black is perfectly fine