I'll often leave my phone at home if I'm going somewhere with my wife and kids. If they're with me, they have their phones and I'll instantly know if something happens to them, so no need to carry my phone.
It's basically a self-psyop to break the dependency. I spent the first 25-ish years of my life without a cell phone, after all.
I used to take my phone with me all the time (I used to have an iphone mini). The current models are too big. They are nice when i’m on the sofa surfing the web, but a hassle to take then in my pocket
I agree the current models are all too big. I'm still using a Pixel 4 mainly because I don't want a bigger phone (oh, and free Google Photos storage of course).
Yes, far more than the average person - vehicle, car camping, backcountry, kayak, etc. I take my phone as a camera (still/video), for an extra map option with GPS, and for reading e-books or editing photos at night in the tent.
Many people take their phone with them when camping. Even if there's some desire to "disconnect" (which not everyone has), people still want 1) a device for emergency calls, 2) a camera, and 3) a map.