That's a fair point, currying is the main offender here, partial application is just making a new function. With the right name it's not harder to understand. It does add complexity because you have layers of dependencies instead of everything being in the same place. The example is always some simple math, but usually functions are doing more, and when they get changed it isn't always obvious that the things that rely on partial applications of those functions are also affected.

But that is true of anything that uses any dependencies, and a fundamental part of how we usually code. I prefer to reasonably minimize the number of dependencies, and then of course good tests protect you against this problem.