Stewart might consider just how silly he sounds
Then again, maybe he is just enjoying the sound of his own voice.
My bet is that if all performing art went away, it would have less of a negative impact on humanity than if we ended exploration.
Many of the technical developments that allow him to appear worldwide, in shows and movies that allow him to appear as something more than a bald middle age + stage actor he can attribute to what was adapted from space exploration.
It is sad to see someone who has made a fortune off of something, as Stewart has, betray it in such a reactionary manner.
Ed