This is absolutely true. However, I've noticed that teaching them to get comfortable with reading and limiting the screen time (TV, video games) means that they'll shift to reading or physical activities when bored or when they run out of screen time... especially if you let them pick out the books they want.

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.