According to [1] 26% of Americans with 'less than a high school diploma' have 'no books' at home. On the other hand, among Americans with a 'postgraduate degree', 42% have 'more than 100 books' at home.
[1] https://today.yougov.com/society/articles/47712-how-many-boo...
This also requires spare time. In US at least, things aren’t as setup to support such allocating enough time for kids. Forget reading time, even basic sick time is tough for most.
If you'll permit me a generalization, well-off parents generally have more time, energy and money to spend on their children's development. For example, if you're a stay-at-home parent, you have more time to think about how to get your kid reading. Maybe you're teaching them directly, maybe you're buying books you think they'll like, or teaching by example by reading books in your spare time.
If both parents are working double-shifts to make rent, you might just be happy that your kid is being quiet watching TV, so you can get some sleep.
I started with the sounds that each letter in the alphabet makes when she first turned four I would guess. It wasn't exactly easy, but we'd try to go through the exercise before she went to sleep each night. At first it would take over a half hour to get through it. After a few months of on and off she had it down pretty well to where sounding out letters was possible. Each step is a challenge that they have to get through and it's also a challenge on the patience of you the parent.
I have a friend that has a kid that only wants to play Minecraft....she complains he won't do anything else...but then she enables that by giving him so much screen time. I think if you handle certain things the right way, the problem will sort itself outside certain disabilities.
While I'm not against that, it does prevent a challenge to screen time. They have homework to do and will be doing it until you look away, then suddenly they're back on youtube.
We had to restrict even the school devices to public areas of the home, which is unfortunate.