Well, my assumption was he doesn't really want more goat sacrifices but rather less interventions. Otherwise, what does he have against goats?
I think neither you nor the comment you are replying to are understanding what the article is trying to say.
It is saying, acts must be done to reaffirm the commitment to the goal, the goat is a litmus test as to whether the goal is worth it. Not to abandon the goal, some things are worth the sacrifice, but to be aware of it.
“That’s why the worst possible reaction to a failed intervention is resignation. We may not know enough to improve our lot right now, but perhaps we could figure it out, if we tried.”
From reading the whole post, I gather that he’s truly not advocating some libertarian angle, he really is writing on the observation that policy is hard, and it’s nearly impossible to actually predict all the effects of societal intervention.
From my reading, I’m not sure even sure that he’s advocating caution or reluctance to social policy. Just goat sacrifices!