Systems reply misses the point
All the Room argument is intended to show is that instantiation of a program that understands Chinese isn't sufficient to prove understanding—as the man instantiates the program and doesn't understand Chinese, the room's understanding is irrelevant.
So the fact that the room as a whole may understand is irrrelvant, because the man (who instantiates the program) doesn't understand Chinese. He is enough of a counterexample by himself.