hold for moving targets or rapidly changing wind is feasable and required (understandably) but on stationary targets HOLD is like artillery's "fire for effect" requiring follow-up adjustments or "walk it in". (guess work/trial and error)
the idea is to KNOW the correct dope to use to insure a first round hit by "dialing in". if your calculations prove to be incorrect, then a last ditch effort to followup with HOLD "may" allow one to complete the initially desired mission.
Mil holds aren't a guessing game ... Your reticle size and mil dots are a consistent measuring tool. I'm not talking about Kentucky windage. I'm talking about calculated, accurate mil holds. It's preference. It's not less accurate by any means.