Accidents that don't rise to the level of negligence can be excused. Letting your dangerous product escape the lab because of amateurish counter-measures is hardly an accident. It's a systemic failure within a company of novices with billions of dollars to blow and it's time we held them accountable for their lab leaks, just like we would if it was anthrax or smallpox. You don't get to be sloppy with dangerous things.