So you believe that the one control is roughly 1/3 the cost of the entire product? If we take away marketing, retail mark-up, etc, that could put a $180 part to at least 50% of the cost of the drier (which has a motor and drive parts, the rotating drum with bearings, 3 other controls, the external housing, assembly, shipping, etc, etc, etc.)
For the truck, the parts are probably environmentally qualified, so that makes them more costly than the stuff from Fry's.
But the cost for safety design and certification -are already paid for- in the product. There's no justification for trying to recoup engineering costs for subsequent repair parts.
There is carrying cost for repair parts. If the item cost $5 to make, I don't expect to buy it for $5, due to inventory costs, transportation costs, etc.
So no, I don't accept that the cost of either of these two items is at all reasonable, even factoring in safety and environmental qualifications. (I've worked on safety-critical and embedded vehicle projects, as well as inventory control systems where we had to calculate carrying costs as part of the 'reorder point' calculation, so I claim some specific domain experience.)
With respect to Apple, they have set a specific market. If that's not your market, OK, go elsewhere.