This callow behavior is not restricted to tango. I would bet that everyone of you reading this who dance other styles could give dozens of examples from, say, salsa or swing or ballroom. It comes from the simple fact that no one is perfect, and some of us are less perfect than others.But. It may be more prevalent in tango.
How quickly the brash creative young bloat into oldsters, and become the new fuddy-duddies mumbling into their beards about the good old days. Oh, the agony! The tragedy! The humanity!