Having a clogged nose right now...what is so evil about mouth breathing?!?

There's some kind of political committee report on the Kundus bombing event in the German news now. It strikes me how self-evident it appears to be for everyone involved that an officer who makes one mistake has to be fired and isn't acceptable for further service.

The zero failure tolerance has set in and I didn't see it coming.

Shouldn't it be self-evident that learning from mistakes, not mistakes themselves is critical? We are all fallible human beings, after all!