I think it's because it's more likely for a console to be available to a kid than a gaming PC. In comparison, consoles are a lot cheaper than a "specialised" PC with the proper hardware. As a result, most kids grow up with consoles to play games on, never experiencing gaming on a PC firsthand.
I guess sitting 2m away from a TV helps hide the comparatively poor graphics as well, but then it should be said that graphics don't make the game in the first place.
Given the average Xbox user's intelligence, as presented (or stereotyped) in YT videos, it's probably for the best they stick to consoles anyway.