It is both. They both absolutely contribute to our mental health crisis, and I'd argue it's worse in suburb-locked North America. I, as I'm sure others have as well, have identified these two individual problems as major offenders of my mental health. When I spend time away from both, I feel magnitudes of order happier. Mix that with the dystopian job culture of "the future" (today) and you've got yourself a nightmare only 80s writers would've thought of.