"The shameful does not learn" - Talmud
I agree with your point, but I do not think the emotion should be dispensed with altogether, if that's really possible. I think you can separate social embarrassment, which in this context is counterproductive, from deep very personal private embarrassment of having been stupid.
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.