Tango has so much to do with convention, customs, tradition, habits top down to the tiptoes. (Tiptoes turned inwards are my problem, sometimes) So, isn´t there room for irrational customs? My first TA teacher, an uruguayian, told me that one should listen to Adios Muchachos devoutly and should not dance. And he told me too, "Leave women behind that will not understand this". So, to my mind, if one dips into this culture one should accept all the irrational customs, as well.
Greetings
I was thinking along the lines of superstition, rather than being educated about a culture.
I don't think I've had a single educated person throw Argentine tradition at me at an American milonga. (Sorry if that sounds harsh.) I always get the sense that the person googled "milonga" the night before and is off on a mission to impress people.