Emergency calls working as expected is a live and death issue and I don't think you'd be so blasé about this if it had been you vainly trying to call 911 and so

Emergency calls working as expected is a live and death issue and I don't think you'd be so blasé about this if it had been you vainly trying to call 911 and someone you loved died because of this bug. I assume you see this through the lens of "bugs happen, as long as developers make a sincere effort that's fine" under which most software development takes place. But this is absolutely the wrong way to look at this, and I bet you wouldn't apply this framework to physical engineering artifacts which are subject to legislation ensuring safety standards like bridges, cars or heaters.