Remember, when Steve Jobs' biographer asked him what his kids thought about the iPad, his response was, "They haven't used it." You're more likely to find the "cellphone free" group among high level tech execs and such.
Why is that? It's worth pondering.
I know more and more people, deeply in tech professionally, who are opting out of it in their personal life, across the board. They know what it can do, they've seen it, may have worked on older versions of it, and simply want no part of it anymore.
In a former life when internal company email was becoming a thing, there were execs at my computer company that made one of these minicomputer-based office productivity systems who had their admins print out their email, they'd write responses by hand, and have the admin send the response.
This is true, kind of like how most drug dealers don't do drugs themselves.
Or the broke who can't afford the devices now more and more used against us.
Or those who are willing to forgo the conveniences of such devices in exchange for privacy. Or, simply for the sanity of not having to deal with them.
I'm firmly in the boat of "Could do any or all of those things" - I considered a PinePhone, have a PineBook Pro, could easily do GrapheneOS, and... I'm currently using none of them. I'm using an AT&T Flip IV that I leave at home regularly. If I have some fancy requirement, I can tether a laptop to it.
You start from the assumption that a smartphone of some variety or another is a requirement - and I'll counter that, while it's certainly the default option of modern life, the smartphone is really only a decade old, and there are ways of doing things without it we can go back to - and those things do generally still work.
I'm at a point in my life where both I can be a bit annoying about things like reachability, and, interestingly, I'm hostile enough to tech that people expect me to be a bit weird about things. Nobody was surprised when I showed up with a flip phone - but they were surprised that I still had things like email and Google Maps capability on it (KaiOS). At which point, the gears started turning.
Trying to find a way to de-evil what is looking more and more like a corrupted, user-hostile system through and through doesn't seem worth the time, when one can work towards not requiring people to be in that system in the first place.