I do, but I'd rather not have a smartphone. I got one in 2019 because I was going to China and I was advised that it would be necessary for me there (in practice, not really, because WeChat wouldn't activate fully for me!).
I do basically nothing on the smartphone except use it as an alarm and occasional means of communication, and to use Revolut to convert money on trips abroad because their website doesn't allow you to make use of basic functions (yes, I then withdraw money from an ATM there). I frequently leave my phone at home.
The problem is that you're portraying this as an absolute. Privacy, like many things, is an ideal. We are sometimes forced for reasons of functioning in society or work, to accept making use of systems and sharing information that we'd rather not. It doesn't make sense to be "well, I have to use this bad-for-privacy thing for reason X, let's abandon privacy altogether" any more than it makes sense to be like "oh, I got overcharged here and can't get the money back, I'm now going to go around throwing money on the street".