I think there's a good chunk of it that's just nerd-sniping.
Some it was just a sort of stand-alone complex, too; people started writing monad tutorials because people writing monad tutorials was the thing to do. In the Go community, there was a run for a couple of years of people making stupidly overoptimized HTTP routers, even though there's very few websites where that's actually the problem and even fewer where the answer was to create a fancy router. Why? Because other people were making stupidly overoptimized routers. It was a smaller instance of the same thing and ultimately damaged the community less than I think the overfocus on monad tutorials did for Haskell, but it was not the best thing for Go.
Monad tutorials did have a particular problem, though, which is that rather a lot of them were wrong, too. I made my own list of issues here: http://www.jerf.org/iri/post/2928 That particular post is in the context of people trying to implement "monads" out of Haskell, but the misconceptions I list tended to come from the lower quality Haskell tutorials in the first place. Then, as is the way of things, the wrongness spread around the world before the correction had its boots on, as the saying goes.
Some it was just a sort of stand-alone complex, too; people started writing monad tutorials because people writing monad tutorials was the thing to do. In the Go community, there was a run for a couple of years of people making stupidly overoptimized HTTP routers, even though there's very few websites where that's actually the problem and even fewer where the answer was to create a fancy router. Why? Because other people were making stupidly overoptimized routers. It was a smaller instance of the same thing and ultimately damaged the community less than I think the overfocus on monad tutorials did for Haskell, but it was not the best thing for Go.
Monad tutorials did have a particular problem, though, which is that rather a lot of them were wrong, too. I made my own list of issues here: http://www.jerf.org/iri/post/2928 That particular post is in the context of people trying to implement "monads" out of Haskell, but the misconceptions I list tended to come from the lower quality Haskell tutorials in the first place. Then, as is the way of things, the wrongness spread around the world before the correction had its boots on, as the saying goes.