I think the staunch "no screen" mentality is a broad-stroke lever that non-technical thought leaders in the child wellness space have stuck to, and I understand where they come from.
Though, as someone who owes his livelihood to being able to tinker and experiment with technology as a child, I'm looking toward a more measured approach. I may very well set up an airgapped Linux box (Windows has come a long way since the XP days, and gone entirely the wrong way) and let my kids proverbially "have at it" - this way, they can't get stuck in big tech's psycho-loops or sucked into YouTube's colourful dopamine machine - which I think, is the entire drive behind "no screens".
I think well-measured exposure is imperative.