Quite amusing I thought, but like many Monty Python sketches it went on for too long. Comedy silliness goes back a long way of course. Silent film slapstick for example - all those custard pie fights. Music hall showed comedy silliness too and no doubt slapstick has always been with us.
Yet it raises an obvious question - has comedy silliness become part of our culture to a greater extent than in the past? If it has, then maybe mass entertainment is the cause, but so much silliness seems to have spilled over into areas which are not supposed to be silly.
Maybe comedy has to be silly and silliness is more fundamental and pervasive than we imagine.