I think there's a lot more to be blamed on a planet that's getting hotter, pesticides in the food, lead in the soil, plastic in the food containers, hormones in the meat and cheese, and cost of living that goes up while salaries don't. Social trust is at an all time low. 99% of the population gets poorer everyday and can feel it. There's no hope of things getting better, so yeah plenty of people stop doing enriching activities.

Porn isn't the cause, it's a symptom of a population losing hope that things will be better for their kids. Or that can't afford kids at all.