After further thought, it seems like having a reputation as difficult to hire for and a reputation for attracting smart people would be two very good reasons for people "only in it for money" to learn Haskell.
Not sure why you were downvoted here, I agree with you on this. The only thing is that there aren't a lot of Haskell jobs out there, and that is a far stronger signal to people looking to jump into the software industry than the nuanced opinions of industry veterans in forums like HN.