Even knowing all of this, I still have a hard time not using a smart phone. I have ethernet going to every part of my house and use usb-c to ethernet adapters to plug my phone in (I also use powered usb-c docks so that it can charge while using ethernet). I keep it in airplane mode at all times and don't even have an access point broadcasting wifi. Location services is off. I need to get an RF meter to verify that it is not emitting any signal, but I've watched several videos of people testing it, and it seems to work. I have my cell number set to forward all calls to an MS Teams phone number, so I still get calls through the Teams app on both my phone and laptop. This was initially an attempt to remove all of the rf noise on my property. I can't get away from the cell tower signals on my property, but at least I can minimize the locally created signal pollution. There were some pretty good posts here regarding the negative effects of RF pollution from wifi and 4g/5g.

When I leave my house, I keep my phone in airplane mode. It only comes out of airplane mode if I actually need to make a call while away from the home, which is rare.

I think you would have better luck convincing people to inhibit their phone's tracking and connectivity than giving them up altogether. Either way, I don't think the masses would ever give up their smart phones. How else are they going to stare at social media all day and text each other constantly? This is like getting all heroin addicts to quit heroin collectively. I don't think it is possible.