They are not. They are necessary for the development of future models, which does not influence the availability of the current ones. Plus you have chinese models distilling current SOTA for pennies on the dollar, so as a consumer I never will be worse off in the long (1-2 years) run.
Great, but that's only a part of operational costs. A craftsman's revenue may exceed the electricity bill for the power drill, doesn't mean the business is sustainable.