And on the plus side that liability also provides people a lever with which they can push back against stupid managerial decisions. My father was an aeronautical engineer, and his favorite word to say to management was "No". Yes, the engine inspection takes a long time. No, I cannot cut corners in any way just to save you some money (No idea if this is just one of his stories or a real situation, but you get the idea :p ).

I don't know why people are so against it in this field

My guess is that it would impede outsourcing and end up costing companies too much money.