> what's confusing about it?

In my opinion the confusing part is mostly the fact that taking a markup language and embedding it into a scripting language is really awkward. You have two completely different types of syntax not only existing together but working together.

Also I've worked on multiple teams where designers will re-style and even change the markup of pages but trying to get non-developers to do this with JSX is just painful.

I find HTML and the DOM API awkward at times but since that's the final state I just prefer to work with that.