[Folcon]

Surely that isn't a weakness of a simple tool?

A 5 min job that probably won't get extended saving you from having to spend 20 mins coding something up is better than, feeling annoyed that you have spent the 20 mins coding up the original implementation and then extend it.

Hopefully, you also get the benefit of additional knowledge on that future implementation as well. Why wouldn't this just be a net win?

Unless you're talking about writing hack after hack after hack, eventually leaving yourself with some incomprehensible eldritch monstrosity, in which case, don't do that?