Do note that calling functions with the unsafe side effects is not Haskell-style, as that expression is not even possible in Haskell without literally typing wo

Do note that calling functions with the unsafe side effects is not Haskell-style, as that expression is not even possible in Haskell without literally typing word "unsafe" into your program at least twice. It is supposedly "Haskell-style" only in the OP's incorrect description.