> most people are probably better off with a dumb phone or no phone either over the current options, IMO.

...if you're primarily concerned with security.

Most people are not. They're primarily concerned with convenience, staying connected to people in their lives, and entertaining themselves.

And guess what? The iPhone does a pretty good job at this, while also being very good (not perfect) at security.

In general, if you start thinking of anything in the mode of "most people would be better off doing X the way I do it, but they don't", you need to start thinking about a) in what way they would be better off (because in 99% of cases, it's not going to be "universally, with no tradeoffs"), and b) what differences in understanding and priorities "most people" might have from you that would cause them to make those choices.