Let me explain rationale:
No, it does not make sense to add sugar to the mash. It also doesn't make sense to add sugar period, in my opinion, but I digress.
If it is indeed a recipe, rather than an ingredients list, then you follow the recipe. That's what a recipe is. I wouldn't ever use a recipe if I already knew how to make what I wanted, and if I didn't know how, I certainly wouldn't pick a recipe and then change it.
Sent from my iPhone using Home Brew