To a certain extent I agree, but I think you're missing a lot of nuance there. Boeing, for example, have built a lot of planes that fly as expected. The problem

To a certain extent I agree, but I think you're missing a lot of nuance there. Boeing, for example, have built a lot of planes that fly as expected. The problem is the ones they built that don't: where bits fall off them or where their sensor systems don't work. So do Boeing know a lot about aeronautical engineering, or are they just guessing? To what extent are they just pretending their planes are flying?