I think you have to start by understanding that "gaming" or "geek" culture seeming like it leads to reactionary views or pipelines has a lot more to do with who "gamers" actually are, not what their hobby happens to be.
In most cases, videogames, table top RPGs, Warhammer 40k, pretty much any of the stuff you'd typically associate with the subculture, all of these things have been nearly entirely out of the reach of the vast majority of poorer working class kids in the past 30 odd years. As tough as it might be to hear, these have always been expensive and toys, hobbies and privileges to take part in, with maybe the exception of comic books, nearly everything else has a fairly steep entry fee, needing to buy computers, several books, figurines, videogames, merchandise etc.
It's really no wonder then, that the majority of people who are actually able to keep up with these costs will disproportionately be cis white men from the imperial core, as the group that happens to be at the top of the social structure of the world with the most amount of disposable income. And I think this is where the problem really stems from.
It's not that geeks and gamers just happen to be more likely to become reactionary, it's actually somewhat the opposite. Reactionaries, through their inherent privileged position in the world, are simply more able to get into this lifestyle in the first place. Geek culture and fascist/reactionary views might seem correlated, but they're both just part of a path of least resistance for a certain type of person.