I want to make things not argue about the best, or most technically correct, way to make them.
Personally, I consider it more complex to have to think about what side effects every piece of code has and what order things are evaluated in. The fact that I don't have to worry about these things in Haskell is a breath of fresh air for me. Also, not having to deal with the complexity of OOP when an ordinary function will do.
I think it's a misconception that Haskell is more complex than whatever popular OOP language people are using. It just looks more complex because it's less familiar (which I think is a problem with what we teach students in school).
This is a problem I have at work. Everyone here thinks unfamiliar and hard / complex are synonyms. They aren't!
Well, not all programming languages are for all people, and there are people who prefer the theoretical approach. Calling that an obsession with complexity is, I think, unfair, or at least inaccurate.