I think it's more of a funny play on an established format, with a touch of "get owned musicians" on the side. I actually have a degree in music myself, so I can promise you that its all in good fun.

At lower ranks, speedflip kickoffs are generally used to get to the ball much faster than your opponent and then chip it over them for a free goal. These kickoffs generally prioritize speed over getting a good hit box on the ball, the plan is for your opponent to not even get a touch. At higher ranks where most people know how to speedflip, its used to get a good hit box of the ball, but faster. Getting to the ball first allows you to have more control over how the kickoff develops and therefore is something that people are very interested in. If you try to use a regular flip at high ranks you'll find yourself losing most of your kickoffs due to this speed difference.