actually, this IS the point of learning FP. it's a different way of thinking about programming and it offers you a new way (often a more elegant) of doing things.

it's usually worth the effort. writing code in a functional way (even without a functional programming language) simplifies testing, often improves program stability and robustness. the more side-effect-free or pure blocks you have in your code, the easier you can build a composable or a concurrent program. basically, most of the principles of good software development (SOLID, DRY, KISS, ...) are native to FP.