But you can like both React and JSX. It’s up to you: to use it or not.
You can even use JSX not only with react-based applications. You just need to
babel-preset-react and integrate it with webpack. All
details could be found here:
There is also a way to use it without webpack too:
npx babel --watch src --out-dir . --presets react-app/prod
Please, be sure that you use npx, not npm command here.