People playing these games aren't doing it to gain a marketable fluency to allow them to get a great job and prevent their family from begging (as your alternate future would supposedly have entailed). They're doing it to wind down after the end of a day, to experience something entertaining. Being forced to do it in another language is not anyone's definition of fun (instead it's alienating) and that's why despite the original game existing in English, the author mentions fan translations popping up. Btw, knowing just English will also lock you into a silo—that of the anglosphere and despite your veneration for it, it's not the end all be all of culture, nor do its tendrils reach everywhere. (for example, there's a wealth of Japanese literature that hasn't even been touched by American translators; same for so many interesting cultures in other countries) localization is a gift of culture to those who speak other languages—it's the same thing that allows Americans to enjoy French poetry, German philosophy, Korean comics, etc... Don't be so hasty to put down the whole world just to feel good about your own choices and shame those who aren't so capable or willing to jump on the Anglotrain.
[0]: http://fortune.com/2017/02/09/study-china-will-overtake-the-...