Ugh, you are comparing an F-350 Diesel costs. An F-350 is a truck targeted directly at the commercial market (not that commercial buyers are its only purchasers). It's the kind of truck you buy if you want to tow ~30,000lbs or haul several tons in the bed. It represents <1% of the trucks people see on the road.
30k lbs, yes. "Several tons in the bed," apparently has to be pretty new, but the newer ones show nearly 8k of payload capacity in the bed, which certainly surprises me!
At least out here, I see an awful lot of "full ton class" trucks, but I'm also in a rural area, and an awful lot of 'em have trailers attached. Which, certainly, argues for the commercial market.
The "truck tax" you talk of absolutely exists though for the type of truck you have, because (a) they are rare and (b) these are trucks that typically businesses can write off that up-charge as a business expense.
(a) They're not that rare, though I do lump any of the "Super Duties" (3/4 ton, 1 ton, etc) together.
(b) As near as I can tell, the parts aren't that expensive just because they can be, they're expensive because they're just massive. My water pump is the size of a small scooter engine. Same for radiator hoses, suspension parts, etc. They're just
big.
For the actually trucks most commonly bought by "truck lifestyle" folks the parts aren't more expensive than other large consumer vehicles.
I guess I see a different version of "truck lifestyle," perhaps? I don't consider "I drive a stock F150" to be "truck lifestyle." Out here, at least, that's a halfway reasonable vehicle, though most people I know with one also have a smaller car. Nor would I consider a F150 to be a "monster truck" in the context of this thread. The "truck lifestyle" stuff I refer to is the "I have an impractically lifted pickup with motorized steps that come down so I don't need a ladder, with stacks in the bed, not that a 7' high bed is practical anyway..." sort of stuff. I've seen them, I think they're just as absurd as anyone else, and I can't wrap my head around how one has, in many cases, literally as much money as our house wrapped up in a truck that is objectively bad at being a truck. At least the guys who slam their trucks have a low bed to work with!
I recognize that my truck is an expensive bit of transportation to run, I try to avoid taking it for things that the car could be used for, but it also allows us a rather efficient car in that we can cover everything else with the truck.