This is my understanding of it all as well. Like, if your parents never stfu as a kid or you never had a chance to really be alone and quiet and safe as a baby, your brain, your very concept of self, is hardwired for constant stimulation such that it's uncomfortable not to have it, to the point of sitting their for 14 hours reading Wikipedia pages or whatever because it's more stimulating that it would be to stop and wash the floors or so the laundry, or maybe just talking your fingers in class or letting your mind read every sign and bumper sticker while you're driving. It's also why all the most effective treatments are about emotional regulation.