You run into them every once in a while...caliber snobs
A CZ75, is a darn good emulation of a Browning Hi Power, and was a Soviet Bloc pistol, until the wall fell. The 9mm Parabellum round has been around near one hundred years now, and has worked successfully in WW1, WW2, Falklands, and quite a few places of darkness in the night.
Never mind those that want you to walk THEIR chosen path. THEY are NOT you!