Which is exactly why he isn't advocating plain javascript. You should take a look at micro-frameworks like Intercooler (and htmx, unpoly alpinejs etc). For devs who don't remember the days before megaframeworks it can be quite illuminating to see a different way of looking at things.
Plain javascript is painful.
It’s nit necessary to throw out react to address the issues identified here.
The author comes across as fairly junior.