I’ve found this explanation to be useful and easy: Haskell is the Mercedes of programming languages.
It has features you didn’t know you wanted or needed and eventually other languages will get there, and Haskell will seem average/harder to differentiate.
I’ve written a more practical post on why Haskell is worth using[0], excuse the clickbait title.
[0]: https://vadosware.io/post/how-and-why-haskell-is-better/