ISO12800 Street Portraits

I hear a lot of people saying we should not go high ISO on Micro Four Thirds. While I agree larger sensor formats like full frame will always be superior when it comes to noise control at low light, high ISO environment, I don't see any reason why we cannot shoot high ISO with Micro Four Thirds. We should stop obsessing about high ISO noise, it is not the end of the world. and a good photograph is a good photograph