There is no good reason for kids to have tablets and smartphones, and parents who give those devices to their kids are bad parents. Those parents also make it hard or impossible to make that choice myself as a parent, because I also don't want my kids to be the odd ones out or social pariahs.

There is also practically no good reason for adults to own such things, as they are designed to fritter away your attention on the cheapest content possible (generally old, re-hashed "community generated" content).

In my opinion.