The advice is based on experience. Imagine asking this question in 2002. That’s before social media, before ubiquitous data, before smartphones, before streaming.

Your job is to grow as much as your child so you can support them when they start having adultish problems; can just stop following your agenda; and the only tool on your toolbelt is being the kind of person they want to be around.

Screen time is rounding error on the quality of parenting. Stop arguing on the internet. It is pretend work.