JavaScript is a better, but JSX is not JavaScript. It reuses many features from JavaScript, but you still need some sort of translation (compilation) step to make it useful. In this sense it is not really fundamentally different from any of those what you call template languages.

You can argue the fact JSX better integrates syntaxes from a proper programming language makes it better than other templating languages (and I’m not going to try persuading you otherwise), but the “JSX is better than template language because it is not one” stance you’re implying won’t help you win any arguments.