>We should be asking how in the fuck there are so many children with unsupervised access to devices that this is a real problem.

Post of the day right here.

Reason is that parents, especially young millennial parents, are overworked, underpaid, and struggling, and they grew up in a world where technology wasn't as invasive, so they are willingly naive. They get home from work and their kid won't stop crying until they put a phone/tablet in front of him/her, and if it works, it works. short term wins for long term losses.