Your criticism of Haskell here just doesn't have the ring of truth to me. Haskell has lots of good, modern frameworks and libraries for doing web-related things, which aren't difficult to use or any more corner-case-y than their corollaries in other languages.
I get the vibe that there is some underlying point you're attempting to make and that the Haskell-specific stuff is secondary. Maybe your point is that using a technology stack with unproven maturity in a given domain (in this case web application development) is riskier and likely more time-consuming than using the more common stacks for that domain. If so, then I agree. (But I'm also very appreciative of the early-movers who put in the time and effort to make immature ecosystems around nice technologies more mature; somebody has to do it!)
I get the vibe that there is some underlying point you're attempting to make and that the Haskell-specific stuff is secondary. Maybe your point is that using a technology stack with unproven maturity in a given domain (in this case web application development) is riskier and likely more time-consuming than using the more common stacks for that domain. If so, then I agree. (But I'm also very appreciative of the early-movers who put in the time and effort to make immature ecosystems around nice technologies more mature; somebody has to do it!)