but gatekeeping isn't bad
Gatekeeping is like 90% of social structures
If I go to a club i actively want people who look like shit or who can't be bothered to put on a fucking shirt to be blocked/discouraged from entering, because I simply don't want to be around those people.
I've run into women that actually know a thing or two about video games, and also many that are insufferable or simply not that interested in games, often playing in order to play with a significant other, which is fine, but obviously that's not going to be well accepted when you don't really have much in the way of either skill or interesting things to say.
That's people, men and women are a little different and you see things expressed differently in both. Video games where you sit down at a desk and play a competitive game are absolutely disproportionately played by men, and there's absolutely reasonable lines to draw between different kinds of games. The lines are arbitrary and situational, but if someone plays 90% Assassin's Creed and Mass Effect, I'm going to see that person's knowledge differently to someone who plays Squad and Mount & Blade, obviously.
It doesn't matter how many shitty comics made by people with the minds of children are created or how many troll bait posts people make, it's not going to change the reality that elitism is based on perception, and if you perceive everyone as elitist, maybe you are just shit.