Always a pleasure to visit ATC - and, in the days it was allowed, to take ATC members in the cockpit.
It just needs a bit of effort and time but is of great benefit.
Maybe you could look at an ATC order versus RA situation in real time...
It is the hardest thing in the world for a pilot to go contra to an ATC order but that is just what he must do if TCAS gives an opposite RA.