Haha well, he's not wrong. Perfect handloads are a relatively small part of the equation. Better wind and range ability count for a lot more. So go shoot, a lot, at things up close and far away, in good weather and bad, from a bench, the ground, and in the fetal position behind a log.
And shoot a 20-shot string every once in a while - because it'll force you to make 20 of the same load and stop messing with whatever you're "testing" currently.