Oh my lord, this article is non-sense. Had you gone to a website and had not been able to read anything I would say... good point. But you went to a Wordpress admin to prove your point. Lord have mercy... you're really going to hate your experience once WP switches to a JS based editor. Quick, let's try using Facebook and other apps built on JS frameworks and complain about the functionality not working. Let's try searching data tables with JS off, and let's try making ajax requests to load data over time instead all at once. It's not only in your browser it's in your phones, in apps that provide you services you can't live without.
These type of articles are a shame and are only written to instigate fights among developers. The world is using JS, it's on every major app. Get over it or make something better.