If you are far away from the peg and the hole, you use a robotic arm with high strength and poor sensors, and you have blurry vision (this would be the equivale

If you are far away from the peg and the hole, you use a robotic arm with high strength and poor sensors, and you have blurry vision (this would be the equivalent of the mindset of a high level programmer that lives far away from actual hardware, and I "ashamefully" include myself here), all pegs are pegs, all holes are holes, and the trusty robotic arm dutifully forces any peg into any hole, regardless of their shape :) When you eyes and mind swim in weird Javascript architectures all day, with 70% of stuff happening in the browser and the other half in a high level server-side language VM, monads in Haskell don't feel any less natural than anything else. That's why you see a lot of things like 'lisp to javascript' or 'haskell to javascript' compilers, because at this level, so far away from the actual hardware, the shapes of the pegs and holes don't matter that much (because trusty VMs fit anything into anything) and they are too blurred to distinguish anyway...