Blarby, I am a CNC Machinist by trade. I deal with measurements in the thousandth of inch range daily. There is no way to reliably remove a die from a press, place another and put the original back in its exact location. A speck of dust might foil your plan, not torqueing the die with the same force will affect its placing. I have to torque every tool change to exact specs or my result is different every time. I know this from years of living in a world where an inch/ounce here or a thousandth there, times a dozen tool swaps, different type of lubricant at the microscopic level means ten years later you are not repeating your original work. I own over 20 torque wrenches that along with measuring devices and meters go in every year for NIST certifications. When a caliper wears beyond its ability to be calibrated it gets replaced. Same with meters and wrenches. I have torque drivers that go down to 1/10 of an inch/ounce. For setting large equipment I have a torque wrench with a 10 foot T handle designed for two men to torque bolts to 8,000 foot/pounds.
So what does .006 look like? At the range, magnified by 1,000 yards of flight, its the difference between 1st place and 10th place. I have friends that think I am nutts for taking the press off the bench because untensioning and retensioning the mounting bolts can't be repeated. But that is what happens when you hang out with machinists who shoot f class rifles.
I can deer hunt with a box of factory ammo in a 30-30 lever gun and deer will still die wholesale. But I am the type who due to trade understands that due to gravity man cannot make a truly round ball for a set of bearings. But the closer you get to round, the better your machine using said bearings works. So you can poke fun all you want. But my guess is that the guys that are die swapping don't want to shoot Palma Match with me. I am not a great shooter naturally as some so I have to make up for lack of talent with mechanical advantage and lots of practice. Whether that be as mechanically perfect possible with my rifle or ammo, every variable I remove makes up a little more for shooter error. So what about a few extra rock chuckers? I guess when I live in a world where I don't blink over a 10,000 dollar oscilliscope, a 60,000 dollar tool room lathe, or a 45,000 dollar surfacing machine just to ensure a piece of metal is as flat as humanly possible it is hard for me to relate to folk that think a reloading press is a major investment. I probably have more invested in measuring devices on my reloading bench than most have in their car. It's who I am. Not bragging or spewing, just once a person spends 30 years living in a microscopic world its hard to think outside that box.