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I think you are using words and concepts with multiple definitions like "good", "perfect"(for whose purpose) and "rational". You are swapping definitions at will and it's leading you astray.

Perhaps look at this to temper the econofountain -

http://www.forbes.com/sites/peterubel/2014/12/15/is-homo-eco...

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"Perfect" isn't a loaded word here, it just means maximally rational.

Take 2 bundles of products - A & B. They both cost the same, but bundle A would bring you 2x as much joy/utility/whatever-you-want-to-call-it than bundle B. To choose bundle B would be "less good" for you than choosing bundle A: that's what irrationality is...by definition. Choosing A is the "most good" option: that's what rationality is. Someone who chooses A over B 100% of the time is a "perfect consumer".

It doesn't mean that in the original quote.

Substituting a term of art for a common usage is a bug, not a feature.

Substituting personal definition for standard definition is the bug here.

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