I agree with the main thesis here but differ on most of the details. I would say that first person, realistic video games where you can choose the protagonist's gender, are AGP training systems for males specifically, and generally trans identity trainers. Very similarly to porn, they train the brain to eroticise a certain persona. In fact they eroticise an identity - in the sense it was used before trans, as well as its current sense. If you go back to Lara Croft, Tomb Raider, this is the deliberate eroticisation of male players projecting into an attractive female body, operating it while also voyeuristically observing it. This has been a staple of first person video games ever since. Within a decade or so this type of identification was leaking into porn, first of all edgy and specialised, later becoming mainstream and endemic. From there the fetish broke out into the real world as part of the general mainstreaming of fetish behaviour and porn behaviour. The current gaming world is still filled with male players who erotically connect with sexualised protagonists. This is a huge proportion of male gamers, maybe a majority. Millions of males, maybe tens or hundreds of millions, have been trained to have AGP sexual responses.