Actually one big advantage I see is the ability to quickly come up with needed functions and code from Browser DevTools then use the exact same code in a node script.

Personally I use this method with Puppeteer for advanced pages such as Single Page Apps (SPA) and other pages that depend on JavaScript, CSS, or other features in the page. Another example of an advanced page would be a site where you have to psychical scroll and wait for content to load from a web service. In these cases a headless browser with JavaScript makes the most sense to me.

I've found where it gets tricky with JavaScript is if you have a single missing `async/await` you can introduce bugs in your code that take extra time to solve.

For simple pages I do like Python and that you don't need `async/await`.