Sure, but the fact that weird stuff is possible means that someone, at some point, will try to use it in your codebase. This might be prevented if you have a strong code review culture, but if the lead dev in the project wants to use something unusual, chances are no one will stop them. And once you start...
This is true. I’ve written overly-clever, indecipherably dense code in many different languages. But some languages seem to practically encourage that kind of thing. Compare a random sampling of code from APL, Scala, Haskell, Perl, Clojure, C, and Go. You’ll probably find that average inscrutability varies widely between various language pairs.
Inscrutability to whom? I'm confident someone with 10 years of production Haskell experience will do a better job of reading production Haskell code than a comparable situation with C.
But then again, maybe that was what you were saying.