It isn't about proving anything, the two who have used the glitches are already up in the top 10 anyway, and a lot of the barrel roll locations and amazing short cuts you see were found by one of these people.
It more like a situation where a group of highly talented pilots have taken an age to paint a wall, getting all the hard to get at bits, then they return a month later and a two of the people who helped paint it have been naughty and scrawled graffiti all over it, irritating the others.
By their actions after the event I'm getting the impression that they are both regretting do it, which if they feel like that, sort of answers the question that is the topic of the thread.