But the question is *why* though.
I'm not 100% sure what the solution is because I don't think its possible to simplify the presentation enough that someone whose unfamiliar with the genre can just start watching it and really understand it....but I do think that the first step really needs to be introducing better and more refined tutorial modes into the games so that at least the people who pick it up casually have a better idea of what's going on.
Extra credits had a really good take on this here:
And another video to look at would be this:
Near the end of the second video he showcases some matches against high ranked players where he only uses the most basic of fundamentals (d.mkxxhadoken, d.HP, neutral jump, etc.) and wins. This is the kind of move/mindset that you really need to stress to new players IMO. They shouldn't even see a combo screen until they can grasp the concept of how to move in the game and how to use their most basic footsie tool.