[bluGill]

Almost nothing scales like cars. In many countries nearly every adult has one and they only last a few years. As such they don't need high margins to make high profits.

Food scales even more than cars, and as a result has about the lowest margin of anything people buy.

If people bought jumbo jets like they bought food we could take several zeros off the price (but this would still be more $$$ than anyone can afford even if they wanted one so it would be stupid to try to scale up jet manufacturing that much)