I want to suggest a slightly more nuanced but I think materialist perspective that hasn't been raised.
Gaming generally, especially online gaming, requires a certain amount of capital investment. Most people who play games, at least in the global north (with the possible exceptions of S. Korea and Taiwan) do so in the privacy of their homes (another exception are active duty soldiers, but I don't think people should be surprised at their reactionary nature, at least in NATO+ states). That means they must have, at a minimum, regular internet connection, electricity, a television and a console. They must also be able to afford regular rent and the like. TV and console or even a pc are not exceptionally expensive, but the rent and utilities can be quite expensive. That means that these people must either make enough money to live reasonably comfortably to pay these regular bills, or be students.
Now in much of the global north, the working class has a strong reactionary element, and the middle and upper classes more so. Young boys from the latter two classes almost universally played video games from an early age, and, anecdotally, largely seem to continue to do so into at least some stage of adulthood post university.
Within this mileu, most of those people who are reactionary tend to see themselves as unique individual heroes - precisely the sorts of people who videogame narratives serve and market to. They see themselves as more or less "making it on their own", albeit imperfectly, within the capitalist system. Is it therefore any wonder that the gaming community seems slightly more reactionary than the general public? It is worth mentioning, also, that most gamers are men, who, in the global north, tend to be more reactionary as a group.
Finally, I am guessing we are talking mostly of english language gaming. For instance, in places like Latin America or China, where a lot of gaming takes place in internet cafes, I am not nearly as confident that the same reactionary tendencies hold. I think all these theories about the unique nature of the screen and the lack of physical contiguity are interesting, but I think require a cross-cultural comparison to be credible.