Something social media proved long before AI is that a significant portion of the population would consume low-nutrition socialization like Twitter all day if it lets the avoid having face to face conversations.
AI lets them remove even having to deal with humans over the Internet. It's a bit like the lengths we go to avoid moving our bodies, despite how much of life's joys require physical exertion.
But I guess with the virtual girlfriends and all this was bound to happen.