To all the commenters pointing out the people that talk about LaTeX, you are getting a part of the criticism wrong. It's not: "Why this when we already have LaTeX?", but a "Why this when LaTeX does it better?".

I wouldn't mind for an easier way to introduce mathematics, but just from the example given, I can see right away that the typography in AsciiMath is not good.

Just look at the space (or lack of it) around the inner parenthesis for instance.