I see what you’re saying, but there are intangibles that are hard to factor in. For example, a big reason that air travel is so big an industry is precisely because it is so safe. But that image could get tarnished very easily, at which point you would see a sudden and large drop in paying customers (think 9/11). Consequently, grounding the planes until everyone can be certain of the cause and the remedy is in the best interest of the entire industry (although not great for Boeing in the short term).
