Fair enough, you admitted it at least.

>but I stayed up reading with a flashlight a lot as a kid. Was that terrible for me? Should my flashlight have had a setting to limit the times I can use it? Would anyone say I had an unhealthy book addiction, and that publishers should do something about it?

Did it mess with your cognitive abilities? Your self-esteem? Your self-image? Your limbic system, in general? No? Your dopamine receptors, then? Did it fill every minute of your waking life with escapism? Would anyone read while driving? Or during class, meals, family gatherings, dates, meetings, at the movies? You get the point.

I think the unhealthy potential of smartphones differs tremendously from that of books, just because of their inherent physical qualities and limitations.