A low median value is not a low rebuild cost
Tucson's median owner-occupied value sits far below the Valley suburbs, and people reasonably assume their dwelling limit should follow it. It should not. A limit is set by what rebuilding costs, which tracks labor, materials and code upgrades, and those do not fall just because the resale market is softer. This is the most common underinsurance in southern Arizona.
Monsoon here runs off rock, not pavement
The washes around this city drain a different landscape from the Valley's engineered channels. Water arrives fast off desert soil and caliche that will not absorb it, and a street that has never flooded can carry a foot of it for twenty minutes. Rising water is excluded from every homeowners and renters form, which is the gap most households find out about afterwards.
I-10 and I-19 carry freight and border traffic
Two very different corridors meet here, and both bring drivers who are not local. Uninsured motorist cover on your own policy is what pays when the other driver cannot, and it is routinely left at the state minimum because nobody explained what it was for.