I think the services of a great bootifitter is very helpful, esp if you have hard to fit feet. Unfortunately, it can be difficult to find a great fitter--that's part of the problem. Thankfully since my feet are not that difficult aside from being narrow, it hasn't been that that big a deal that I have yet to find someone that great. (they measure 85mm unweighted and 90/91mm weighted from what I can measure, measure 24.5 mondo, average instep I think and ankle measure like 21.5cm around---so low volume.) My very first pair of boots years ago ended up being huge despite going to a respected ski shop to buy boots (they sold me a 102mm lasted boot when I need a 98mm!!!). Next pair I knew more so I ended up closer to what I needed but still not quite right. Third pair was great on paper but ended up not being a good match for my leg (a fitter also put me into those). Fourth pair a well respected fitter in VT put me into and they lasted for years before any packing out--was sorry to see those go. Current pair the "fitting" was a bit of a disaster and I sort of had to DIY the fitting appointment (made appointment with fitter I wanted/had previously worked with--when got to the shop I got passed off to someone else who didn't seem interested in the appointment/seemed like they just wanted to sell a boot. Keep in mind I had driven 3 hours for this privilege. No shell fit, initially brought out my measured size which of course were huge given my foot volume so I told him he needed to bring out 23.5s instead. I basically tried on every low volume boot they had starting with Lange Shadow LV 115 (too much room at instep and foot), Nordica Promachine can't recall which flex (tongue caused pain on my shins just standing in the boots), Tecnica Mach1 LV (can't recall what I didn't like about that--I think instep maybe felt large), K2 Anthem 105 Boa (away to much volume in boot overall) and another K2 from a previous year that had traditional buckles (still way too much volume), Solomon S/Pro Alpha 110 (felt tight but not painful--best fit of all the boots. but that shop could not guarantee they could get the alpine soles instead of grip walk and since some of my bindings are not GW compatible that was a deal breaker.
I left and went up the street to a diff shop to see if they had anything in Atomic I could try since previous shop didn't carry Atomic.
They said I could do a Redster (not sure which model they had in mind), not sure why they didn't bring out a Hawks Ultra as that seemed like it could be an option, instead brought out the Salomon Alpha again. I tried the Alpha again--still liked the fit. Told them--full disclosure--I just tried these in another shop and the only reason I didn't get them was they couldn't get the alpine soles. Well this shop had the alpine soles in stock--so I bought the boots there. I mean I probably should have tried the Redster, but honestly by that time I was just done with boots and really by that time didn't want to deal with what I assumed would be a cold race liner and was just done with the whole experience overall just annoyed by the fact that I drove 3 hours for what I ultimately could have done 10 min from home at the local shop!
Anyway I will keep trying to find a fitter I like and who will take the time to find the right boot, but just a long winded way of saying that I can see where those who don't use fitters are coming from. It's not always so easy despite best intentions.