I agree completely. Haskell is a more difficult language to learn in my opinion than Python or Java, but there are real benefits in the runtime errors it can prevent.
Not sure why you are getting downvoted, but I agree. There is a learning curve to Haskell, which should not be surprising. Haskell is to Python what Python is to ARM assembly. ARM assembly has less of a learning curve than Python. There's simply much less to learn and it's much more flexible. But of course it's not at all productive and even harder to build correct software with.
Once the learning curve has been overcome, most would agree that higher-level languages are more productive. I am significantly more productive in Haskell than Python, especially for any highly non-trivial problem.
