Well yes, but it's a matter of perspective I think. Is it the amount that the recipe author used? Maybe, maybe not. But is it the amount you used the last dozen times you used this recipe? Of course, as long as your chart hasn't changed.

To be clear, I'm not disagreeing with your general premise, everything would be much easier if all recipes used weights for powder-like-ingredients. But recipes that actually have weights listed are few and far between, I find.