In my country right now there's a lot of hand-wringing about the impact of social media and smartphones on teenagers' mental health and education. We've got schools banning phones, and the government wanting to introduce age checks for social media. Infinite doomscrolling in your pocket, endless brainrot short-form videos, it's not healthy and we need to get smartphones out of the hands of the young.
So there are good reasons people might choose not to get a smartphone.
Then exactly the same government also proposed people wouldn't be allowed to work without a 'Digital ID Card' - making smartphones (and google/apple accounts) mandatory.