You have completely missed my point. If the penalty hadn't been given, City might have tried even harder and scored several goals. Or they might not have of course. No one will ever know. But to take a game that's finished and say "those two goals should have been scratched out so Swansea would...
Why would City not have won last night with VAR? They might have scored a last minute equaliser and scored eight in extra time. Or won on pens. It’s so simplistic to say goals two and three should not have stood so it would have ended 2-1 to Swansea. No one knows how it would have finished...