Yes, because it's obviously good for business to have your plant blow sky high, destroying the entire surrounding neighborhood and killing most of your employees. If I were a plant manager, I'd make sure to put doing all that right at the top of my TODO list.
Or, maybe, just maybe, not everybody who owns/runs a business in a capitalist system is a greedy, evil, soul-sucking bastard, and maybe, just maybe, accidents happen, some of which are damn near unpredictable and unavoidable. And maybe we can't regulate our way to a society where nothing bad ever happens to anybody, ever?