Everything works well, until not. When it is worked for years without problem, but also without correcting initial sources of risks (learning the business afte

Everything works well, until not. When it is worked for years without problem, but also without correcting initial sources of risks (learning the business after the clueless first years) that's like learning while driving that the trunk is full of flammable fluid but driving on as "nothing bad happened before". Buildings should be used within the safety margins of those and prepared for certain type of extrimeties, especially fire. We do not put risky operations into a construction that could not handle or mitigate potential risks (no electricity cutoff, not enough fire extunguising material, no cut off of intense ventillation). Operating a bakery in a barn without alterations comes to mind.