Well not quite. A manufacturing or maintenance defect will not be the responsibility of the pilot (unless they should have spotted it on their walkaround)

I'm not sure what comparison you're trying to make though; the grandparent said there needs to be a similar concept for cars, I said that there already was one. Are you agreeing or disagreeing that there already is one? Are you saying that, at present, the driver would not be responsible for moving into traffic if someone else had flashed their lights? Because that is certainly not true where I live.