Thanks for sharing, Howie! I think it's so important to highlight how sedentary behaviour, including screen use, has multiple risks associated with it across different dimensions of wellness. In other discussion threads we've discussed some of the psychosocial risks associated with screen use, and it's also important to highlight some of the physical health risks (as the article you posted suggests).
The Canadian Pediatric Society has released a guide for physicians focusing on sedentary behaviour in children and youth. In this document it describes strategies to reduce sedentary behaviour, including ways to limit screen time.
Personally, I'm a strong advocate for physical activity as through my clinical practice I've seen anecdotally the important role that physical activity can play in clients' recovery journeys, in terms of the impact it can have on overall health and wellness.