This is a response to something nobody's saying.
Obviously if they write it they get to choose pretty much everything about it. Nobody is disputing such a thing.
However, if one of the goals in releasing this is to be maximally useful, isn't the fact that raw Javascript is more readily understandable to more people a good thing to point out? Especially since it's highly likely that the team actually has the ability to do normal JS just as easily.
If they disagree with such a goal, though, they can feel free to do whatever they want.