Gate Keeping in the Gaming Community: Does Difficulty Really Matter?

I have seen a few “you’re not a real gamer if” posts floating around on the internet, so it got me wondering, does it matter what difficulty you actually play games on? It seems to me that gate keeping within the community seems to be growing stronger by the day, which baffles me. We all share the same interest as gamers, we might not all enjoy the same things, but we play games.