I actually find this wholesome because while dude was initially mocking tarots, what he was really doing was being an active listener and being available for people.
Most of the ones on TV actually do warm reading where the audience gets question cards beforehand so the psychic already has a mark picked out when the performance starts.
Hard to know how much he was listening. It's def a mostly harmless prank so I'm also cool with it, but I wouldn't say he's been actively helping people.