That, plus the crowd who would want or like to hack on a device like this, or at least use a non-Apple app or service, is probably far outnumbered by people who don’t care what (and whose) software can run on their screen in the home as long as it looks nice and works well, which is typically the case for Apple.
They talk about it more but very few (low enough to not effectively not matter) actually do anything about it. If you want to spend less time on your phone you can... just do it. Setup screen time and practice an ounce of self-discipline.
It's the same as when people say "People hate their phones so that's why we created <AI Pendant>", uh people _love_ their phones, some to an unhealthy degree but I've never bought into the idea that people are actually pinning for a way to use their phones less. That's why it's going to be a massive uphill battle for OpenAI to break into the hardware space IMHO.
Apple wasn't wrong in their Keynote about how the perfect "AI" device is already in your pocket. Now, it's more limited than it should be due to the locked down nature of Apple's phones but if you could build anything without restriction on the iPhone platform then yes, it would be a great AI platform.