Who said anything about blaming the OU? The Taz and Magein Avraham hold that it applies to more than just bread. You’re correct that we don’t pasken like that, but don’t accuse me of “making it up.”
I’m not claiming the OU should stop hechshering in these situations. I think you understood my point, but, naturally, you chose to be rude instead.
“It’s always the consumer’s fault” is not a legitimate rebuttal. If Oreos went from dairy equipment to dairy, and thousands of people erred because NOTHING changed about the hechsher, would that still be their fault?