There's a lot of inconvenience in having your vehicle broken into or stolen. I don't keep anything irreplaceable in my vehicles, but it's still a lot of stuff I don't want to have to go out and re-buy and stuff that is probably not going to be covered under insurance (straps, winch, tool kit, first aid kit, dash cams, radar detector, fire extinguisher, LED road flares, tire repair kit, dry change of clothes, etc, etc.). If it's not fully stolen, there's a lot of cleanup and repair of items that were busted and glass that was broken, most of which might not be worth your deductible.
If your vehicle is stolen and recovered, you're not getting a new vehicle, you're basically on the hook to get it fixed and cleaned up, again, you lose the deductible.
If your vehicle is stolen and a total loss, you're not getting a direct replacement, you're getting a check that they believe your truck is worth, and after your deductible, it's not going to be ****, you'll probably be a few grand short when you say "**** it" and buy/finance a new truck.
Oh, and if you have to give a portion of that check back to the vehicle lender, you'll be really short and you will have to start the buying process all over again, at the worst time, too.
Lastly, if someone steals your car and immediately commits a crime or causes injury/damage/death, you're going to have to straighten things out with the police, who are under the assumption that your plates/VIN make you the suspect.
I've never owned 9 acres, but I bought an acre up in Pensacola about 8 years ago. My first week in my new house, I had my BMW parked outside. WAY up on my 200' long driveway and no side access, some hood rat came all the way up the driveway to steal all the emblems, vents, grilles, and mirrors off the car. $5k in damage, particularly because the mirrors were heated/auto dimming/memory and color matched.