As someone who has written tens of thousands of lines across both ClojureScript and TypeScript, this baffles me. I can definitely understand why someone would prefer CLJS, but it has a way higher barrier to entry than TS.

If you're smart enough for Clojure then you're smart enough for TypeScript. That doesn't mean you have to like it though, but you don't have to hide that distaste behind incendiary exaggerations about TypeScript only being suitable for superhuman geniuses.

The overwhelming evidence is that TS is popular _because_ it is a safer and easy-to-understand alternative to JS.