I wasn't mocking your argument, I was agreeing with you and clarifying that my feeling was about who I'm most "irritated" with, not about responsibility or legal culpability.

My example was for simplicity, not mockery.
The power going out is the power companies fault, so I'm most mad at them. The store didn't have a generator because they trusted the power company, so my cake got ruined. I'm still mad at them but less so because they weren't the cause of the problem, even though they could have done more to prevent this from impacting me.
Culpability wise, I can only make demands of the store and hope that enough other people do so that they in turn demand answers from the power company.

There are actually a fair number of certifications, including ones from government agencies, relating to software development, deployment, and related practices. That so many organizations didn't have the ones relating to protection from supply chain issues is distressing, to say nothing of it slipping through quality control in the first place.

Please, if you think we're in a place in this thread where I'd be mocking you, re-read it with the understanding that I agree with you entirely on legal and structural issues, and at most just have a different opinion about where the balance of "fuck you"s go. I think I put more scorn towards the vendor because doing the thing is worse than failing to prevent the thing. Also, I work at a parallel company and so I'm more familiar with exactly how much you have to be fucking up for this to happen because I spent the last three days dealing with the more minor controls that prevent this from happening. Everyone has outages because you can't prevent 100% of errors, but it's on the vendor to build to the spec of their most sensitive customer and ensure that outages don't keep a doctor from patient records.