I get that you had your own premise that blameful postmortems were good, and you for sure aren't alone -- it's pretty natural homo sapien thinking to believe punishment for misbehavior always leads to less misbehavior. Did you question those assumptions, though? When those assumptions were challenged, did you pause to think "Hmm, why DO I think that? Is it true?"

There's an even deeper assumption here, too -- you kept referring to blameful postmortems as "accountability", which leads me to think that you might believe you can't have accountability without blaming and punishing individuals. If this is indeed an assumption you hold, you should question whether it, too, is false.

The fun part is, my existence isn't necessary for you to do this, so your personal preferences regarding my tone and style won't affect your introspection and the resulting answers! :)