Come on, man, you're just being a pedant here. If I say "spending time with family and friends is the most important thing in my life," that doesn't mean I've quit my job and stopped sleeping so I can hang out 24/7. It just means that this one thing trumps all others if there's a conflict.

Which is exactly what the author's saying. "Nothing on any screen is more important than the time I spend with my kid." When he's spending time with his kid, all other things are secondary. When he's not, other things are okay.