If all those fancy high dollar scales make that big a difference, every world record should be falling. Some of my highest clean scores where shot filling cases by volume only checked every 10th round for weight. Some of the best shooters in the world are given contract ammo to shoot and have no idea what it even is, yet they win. Nothing makes you a better shooter like trigger time behind the gun.
Agreed, which is why something that can drop to the 1/10th of a grain in 15 seconds means I shoot a whole lot more than if I have to meter out powder any other way. It's there ready for me to dump as fast as I can do anything else in the process. Same reason I paid for many of the other tools to use, cheaper options abound, but as they say time is money.
They don't necessarily do anything
better, they certainly do lots of things
faster. While I'd argue that either of my automatic powder drops (AutoTrickler V4 and Hornady AutoCharge) are each significantly more accurate that the Lee disc and drum drops I still occasionally use for certain cases, even if there was a volumetric drop that was as accurate the speed wouldn't be different on a case to case basis, and the changeovers would still be faster with the V4.
Flip side argument for saving time. If I was a higher volume precision shooter I'd load on a Dillon progressive. I have no doubt I could get ammo made to my standards off one (maybe even with a volumetric drop), but I don't shoot any one case with enough volume to justify the time and expense in setting up that complex of an operation for one round.
And if anyone doubts, even the oft-linked to Erik Cortina uses automated Dillon presses in parts of his various loading processes. His automated pointing die set up would almost be worth the cost of the press to be able to run bullets through that fast.