True, although finger-waggers do say things like "Well sure, it might have turned out okay this time. But that doesn't mean it was a good idea."

Who says what morality is for? People have moral instincts which are used, often than not, to evaluate already finished actions on good-bad scale. People engaged in actions evaluated as wrong tend to be labeled as bad people in consequence. We encounter this use of morality every day. Maybe you claim that morality should be used differently, but that's your (meta-)moral judgement (prescriptive statement), while the original post and the thesis it refered to were descriptive about morality (and I think accurate).