Many of the people targeting the most popular FP language of all time aren't writing the Javascripts because it's their first choice. Just look at the pretty WILD popularity of Typescript, an OOP bolt-on language which transpiles to Javascript.
The simpler (in some ways) imperative programming model still dominates developer mindset.
JavaScript is OOP already. TypeScript just provides better typing like what you would find in Haskell, Ocaml or other functional languages
I know lots of folks here on HN are super highly competent, and this contrasts with my IRL experience with colleagues who are less passionate about programming and just want to do their job- these folks aren't going to be teaching lessons in proper usage of objects in JS.
In truth, even classes are becoming increasingly uncommon in JavaScript codebases, and most object usage in JS these days is struct-like, where the ergonomics are pretty similar (or identical) to other languages.