In OP's defense I have heard this said unironically by several engineers at my last job.
"Rust is going to replace JavaScript thanks to webassembly, so we should be moving all of our code to that."
"Our client should be in the same language as our backend, just like in GWT"
Even though most of the specifics you point to are wrong, it's a good point overall:
Rust, being #1, should be better than all other languages. The fact that it's just decent makes it seem overhyped, and all the downvotes on haters make it look like a cult.
Back when it was small, the cult-like following was OK. But now that the language is becoming more mainstream I think the Rust evangelizers need to tone it down a bit or they risk pushing people away.
On your point, TypeScript is a decent language too. There can be two good things.