It should be. There are far more important concepts to grasp (component composition, why you should use stateless components, why props are immutable, etc). What I chose for this team was to remove one more (admittedly small) concept so as to focus on the important ones.
Better to train that than this is JSX, here are the caveats about JSX, this is how you compile JSX, yes JSX must be compiled, etc.
Of course, that is just my opinion and accept that it isn’t valid for everyone :)