GP doesn't say it's never happened, just that the typical programmer isn't going to kill someone with a buggy password complexity validator. By and large, the standard programmer does not hold life and death in their hands when navigating callback hell.
Again, the typical programmer doesn't kill someone when they write a bug. Judging from the backlogs of each company I've worked at, not a single PaaS, SaaS, BaaS, CaaS, DaaS, FaaS, GaaS, HaaS, JaaS, KaaS, LaaS, MaaS, NaaS, QaaS, RaaS, TaaS, VaaS, WaaS, XaaS, YaaS, ZaaS, or other would have a living customer base if one bug == one death.
There are edge cases and there are certainly plenty of times when software bugs can kill people. However, to say that the typical programmer holds life and death in their hands with every keystroke is an extreme over-exaggeration and I think you know that.
