Once you accept Curry-Howard, untyped FP languages are hard to take seriously as a foundation for reliability. Curry-Howard changes the entire game. FP and strong types were clearly meant for each other.

Untyped FP languages can be productive, flexible, even elegant (I guess) but they are structurally incapable of expressing large classes of correctness claims that typed FP makes routine.

That doesn’t make them useless, just, you know. Inferior.