I often put jumbo frets, in many of my guitar purchases, there several luthiers in San Francisco with PLEK machines.
I've been extremely satisfied with every one it does a remarkable job. can a human equal it yes, it is simply measuring and cutting each fret.
just think about the time required to accurately measure the height of the string relative to each fret 6×22= 132 individual measurements. the machine can measure and cut once. your average luthier, would have to cut and polish and level recheck, 10 times each to get it perfect. super labor-intensive. I think both approaches could be somewhat equal quality wise, but at some volume or number of guitars, not enough skilled people.
you can string up the guitar put in just the right amount of truss rod. and it uses a laser to measure the height of each fret to within 10 thousandths of an inch, relative to a perfect string. so player preference for action height, may be different than what was set into the machine.
because they generally try to set it quite low. so that's why some players might say I had to adjust the guitar after I got it, but there's no doubt the fretboard and frets are extremely perfectly leveled relative to each other. this is a really good quick profile how it works look at the computer graphics, control screen. it magnifies the curvature of the fret board 10 X like putting it under a microscope so you can see the tiniest deviations.
https://www.sweetwater.com/shop/guitars/plek/index.php
I have a feeling Gibson makes 3 times the volume of guitars, as PRS does, when you reach that kind of Volume you just cannot find people with that level of skill, to turn out 900 guitars in a day.
so I think it's one approach to quality control especially in a high-volume, setting.
check out the rate they're making bodies and tops unbelievable.