It surprises me to hear you say so, given your preference for classical philosophy. We have all those biographies of classical philosophers because you judged philosophies by the way people who held them lived, after all.
Fair enough. It is true that philosophy before the Age of Reason mostly meant 'a way to live which I think brings societal harmony'. Thus some classical ideas persist to the 21st century and some vanished, Darwin-style. And the best way to demonstrate that you've figured out a really solid philosophical system (read: way to act) is to act that way. But mostly I had a problem with a) the generalization, and b) the wording. Socrates was a dick sometimes. More importantly, unless someone's actions contradict their beliefs (see for reference Rousseau, many popes, etc), they aren't relevant. Being smug doesn't have anything to do with liking free trade or open borders. The above dismissal is a logical fallacy.