As someone who don't text or call that often anyway, I actually found the minicomputer aspect the most useful. I can get my Youtube fix during my downtime, I can check my email, I can open an exchange to check on the rates, I can make and edit documents, etc.
It really depends on how you are using it. I remember the first time phones became more widely available, people went zombie mode texting and playing Snake. Heck, there were SMS clans that took advantage of group texting promos. I've seen a lot of people cheat partners and a lot of kids born out of wedlock. And that was around 2 decades before smartphones!
True.
As a pure informational device they're miraculous. It's when the vanity and subterfuge takes root that's when they stop being healthy.