Good point about the super villain angle. So many of the villains rely on intelligence to give them an edge. The Watchmen may have been way ahead of the curve in this area.
This could actually explain the monologuing they may need to show other how smart they are.
The monologuing is a plot mechanism used to allow the good guys to win, in fiction. In reality, if someone is actually that intelligent, unless they are very broken as well, they don't need to show off to people who wouldn't comprehend how they lost anyway, but don't tell anyone.
The secret is safe with me.