For one, as other people have pointed out, these are jokes. They aren't intended to belittle anything that is useless; they are just meant to provide a little perspective about something that is getting a lot of hype.

For another, the hype has been a bit excessive on this one. Calling this "the edge of space" is not really honest. He jumped from 23 miles up, from a balloon. Just the fact that he jumped from a balloon should make you stop to ask if it's really "space"; one of the defining features of "outer space" is that it's beyond Earth's atmosphere, and if a balloon is functional, it is not beyond the atmosphere. While where "space" begins is a bit of a fuzzy question, as the atmosphere slowly thins rather than stopping at an exact altitude, a commonly accepted limit is 100km (62 miles) above sea level. Other measures range from 50 miles to 76 miles. Regardless, 23 miles is nowhere near "the edge of space".

Now, he did break some impressive records; highest manned balloon flight, highest skydive, and greatest speed in free fall. But he did not, by most measures, approach the edge of space. So throwing in a little perspective about that is not bad, it's just deflating the hype a little.