I don't even really see that as a joke. It's in those quiet moments that my brain will often present me with an idea seemingly out of thin air. Who hasn't been dealing with some particularly tricky problem, mulled it over, banged their head against the wall on it, and then while they're eating lunch or taking a shower - BOOM - your brain suddenly puts the right connections together and you have some new insight.
Smartphones seem to be stealing away all the quiet moments of our lives, and I've come to realize that those quiet moments are important. Not just for our peace of mind, but for our ability to really let our brains work well. Lunch has disappeared as a quiet time. The toilet has disappeared as a quiet time. I honestly think it's a problem.
I experimented with not doing any "compulsive consumption" on my phone a few months ago, and while this is purely anecdotal, I felt like it really did improve my concentration overall.