Well, there's the fact that marketers are primarily there to make things look interesting. We're all very aware of this. Marketers gonna market. A snappy bit of branding like 'The Edge of Space' sounds much better than 'Jump From High Atmosphere'.
90% of the people who watched probably don't care that it's not technically the edge of space, and whilst we can all spend time quibbling about it and getting semantics right, we're wasting time going "Not technically space!" when we should instead be focussing on the achievements made.
Really, that's the main achievement of this? Not the testing of the next-gen pressure suits? Or the scientific data on the effects of free-fall and Mach level speeds on the human body? Or the fact that the results will be able to be applied to ongoing efforts with space travel?
90% of the people who watched probably don't care that it's not technically the edge of space, and whilst we can all spend time quibbling about it and getting semantics right, we're wasting time going "Not technically space!" when we should instead be focussing on the achievements made.