[matijash]

I suppose you learned about category theory through Haskell? I did, and I was wondering the same question as you. After doing some investigation and looking what others say, it turned out that "real" category theory is only loosely related to Haskell, and isn't necessary to understand it to work in Haskell. I then didn't go deeper down that rabbit hole :D.

But, from my experience, already learning Haskell would improve ones programming skills, especially if you haven't been exposed to the functional programming before. It is really a mind-changer and equips you with new perspectives which you can use in other programming languages as well.

So I would definitely recommend investigating Haskell, and maybe after some time you can then also go into the actual Category Theory and see how it connects to your Haskell knowledge.