There can be many reasons for low mileage. When I was in the military, there were times I could not drive my vehicles for months at a time. Once I was stationed overseas for a year and left my truck in the states in storage.
[I’m in Arizona too, FWIW, maybe we just drive less even though we have some of the cheapest gas in the west]
I bought a nice new chevy Z71 4WD 1/2 ton pickup for work in ‘07, sold it in @ ‘13, had only 19k miles on it. It was our third vehicle at the time for just the two of us.
I’ll probably be selling my ‘03 Chevy K2500 HD this winter....it’s 15 years old and has only about 89k miles on it right now. My wife traded in her 17 year old ‘01 Suby last winter and it had only 72k miles on it!