I think it's likely that people aren't resting and recovering enough.
I think people are doing the wrong things for rest and recovery. I also think that people are far more sensitive to any fluctuations, which stress them and cause them anxiety in ways that didn't before. Everyone blames the changes in life, but I think it is more the changes in self. Lots of naval gazing, very little interaction with the real world.
I legitimately don't know how much downtime people need, it might be down to the individual,
It will be down to the individual, but that doesn't mean the individual is the best judge of how much they need. A depressed person can sleep 12 hours and still not want to get out of bed. Do they need more rest? Or is the way they are trying to recover not suitable for purpose?
I don't personally think TV is like an addictive drug for the vast majority of the population.
I say TV, but it is all screens. And all distractions. Some people consume hundreds of books a year, while their life and relationships falls apart.