I find that this type of code is much easier to debug in a debugger, while harder to debug looking at source code. When in a debugger, I can throw a breakpoint

I find that this type of code is much easier to debug in a debugger, while harder to debug looking at source code. When in a debugger, I can throw a breakpoint in, inspect inputs and outputs, if they are what I expect, there is (generally[1]) no reason to dive into those other files. When reading the code from source outside of a debugger, as a new person to the code base, I agree with you and the exact problem you are describing. [1] Reasonably written code without a bunch of hidden global state.