I've been a webmaster for 25 years and never had to learn JS. The vast, vast majority of websites on the internet could have been designed by someone like me who doesn't know JS.

Everything is already in a framework or library, and copypasting a few lines of code from the readme/howto is enough to add a slideshow, accordion menu, or whatever other snazzy but terrible UI gimmick that clients want.

The proportion of websites on the internet that actually need React are close to zero (most sites are cms/crud instead of "real" web apps), yet if you're in the web dev sphere, everything everyone else is building seems to need it. Strange.