If he has only t-shirts in his wardrobe..... I can’t say it.
I simply believe that his dress indicates his respect for his audience. I doubt that the camera crew just dropped by his house on a Sunday morning and asked him to wing it. He dressed that way on purpose.
Somewhere, in my readings of Plato or Aristotle, the philosopher cited the decline of personal appearance as an indicator of a society in its downfall.
Togas?