If writing something in blood made it correct I'd keep a pot of mouse blood handy for math tests. The fact that safety regulation is written in blood is one of the tells that it is overdone - it should be written with a dispassionate and distant consideration of the costs and benefits.

The major argument for rolling back most safety regulations is the fact they are written in blood during what was, effectively, a moral panic. Just tightening the regulations every time something goes wrong leads, ironically, to bad outcomes. The optimum state is to tolerate some level of risk.