Any purported expert who uses software without considering its security is simply negligent. I'm not sure why people are trying to spin this to avoid placing the blame on the negligent programmer(s).
In addition to that, it'd be cool if the blameless postmortems were made public, so everyone could learn from them.
As for the other 2 options of restricting freedom, and extremely blameful postmortems, I reject both.
You seem really stuck on the first two options. Why does it matter, given that the third is the best? Do you still insist upon a false dichotomy?
Usually when you don't know something, you ask someone who knows. Since you sort-of asked here, I'll give you the answer:
Blameless postmortems lead to fewer failures, which is ostensibly the goal here. So what do you get from your idea of blameful ones? Feeling good about punishing someone, even though you're increasing failures by doing so?
Either rhetoric and discourse are unfamiliar to you (for instance, that a basic tenant is that one does not make a strong claim which acts as foundational evidence for their entire premise and then assume it to be taken as fact based on statement alone -- if that were true then 3rd graders would win all arguments by saying 'nuh-uh'), or you don't understand that responsibility can also apply to you in many cases.
You aren't alone in your claim -- perhaps it is instinctive homo sapien thinking to believe punishment for mistakes & incidents always leads to fewer mistakes & incidents. Did you question those assumptions, though? When those assumptions were challenged, did you pause to think "Hmm, why DO I think that? Is it even true?"
There's perhaps an even deeper assumption here: you kept referring to blameful postmortems and punitive action as "accountability", which leads me to think that you might believe you can't have accountability for mistakes & incidents without punishing individuals. If this is indeed an assumption you hold, you should question whether it, too, is false.
The convenient part is, my existence isn't necessary for you to do any of this, so your personal preferences regarding my tone and my style won't affect your introspection and the resulting answers! :)