Your argument is a layman can't puzzle out JSON easily, but do you think hjson is any better? Syntactically it's core seems to just be QOL improvements over writing JSON by hand. It isn't any more intuitive from my perspective. In fact, in many cases it seems less intuitive by offering a greater number of ways to do the same thing.
I'll agree with that, but what is the use case for giving this to non-developers? Everything on this page looks like it's directed towards making JSON files slightly simpler for programmers.
If you showed JSON to someone on the street they could probably understand the gist of it (if pretty printed). Good luck asking them to write it.