From my reading around I've found that to be the case, people can't agree. Some fitters will try to get things to be in numerical ranges vs just trying to get the person comfortable on the bike.

I had a fitter who did just that, pretty much turned his back to me to look at his computer and only turned around to make changes to the bike that fit in the angles the computer wanted. I was on a bike where native stack/reach was already 560/390, he added an additional 45mm of spacers and put me on an 80mm stem, and saddle almost fully pushed back on the rails. I said its painful but didn't seem to matter.

I'm 5'9" or 175cm with an inseam of 32" or 81cm. I went to a new fitter and she did't look at numbers or angles a single time until I was in a comfort zone, now I'm on a QuickPro AR:One size small with a slammed 110mm -17 stem, and 25mm offset seatpost. So over 8cm difference in stack height between fits.

I struggle with the modern progressive fit because a higher stack loads my hands and wrists. With anterior pelvic tilt and a good amount of flexibility i need saddle to bar drop to be high to get hamstring and core engagement and unweight my wrists.  It seems the more forward I move the saddle the lower I need the handlebars to be.

Here's mine Size Small about 8.5kg with garmin pedals, computer mount and wolftooth ti bottle cages.

Sram Red D1 Shifters
XO1 Rear Derailleur
NX Eagle Cassette 11-50
Pass Quest 48T Chainring
Sram Force E1 Wide 165mm Crankset
Wheels Mfg Bottom Bracket
LightBicycle WG55 Wheels
Schwalbe G One RS 40mm tires