Boot fitted for about 7 seasons, and I’m pretty ok at skiing by most peoples standards.
I’d say the biggest reason is that if someone is going from one boot fitter to another, it’s because the first one screwed up, and now you have to clean up the mess. You don’t hear from the people whose bootfitter got it right the first time. Fixing a bad bootfit is way harder than doing it from scratch, so it’s easy to be like “why tf did they put this skinny foot in a 102last?!” When it could be something as reasonable as the shop being low on inventory and the customer insisting that they still wanted the boot.
Also, I’ve said this before, but the hardest thing about boot fitting is figuring out how the customer wants the boot to feel. You can legitimately put a customer in 3 different sizes depending on their ability, priorities, age, number of days a season, etc. So a customer may have told their first boot fitter that they’re a badass who wants a race fit, but they decline to mention that they only ski 2 days a year. So by the time they come to a second boot fitter, he’s just thinking “why the hell did he put this beater in such a tight boot?!” Some boot fitters try to inspire confidence in the customer by showing how much better they are, but that’s just bravado.
Also, the more time I spent boot fitting, the more I realized that there’s more than 1 way to skin a cat. The shop I worked at did things very differently than surefoot, but lots of people love surefoot. When surefoot screwed up, it was a bitch to fix. Also, when I first started I would try to make the race fit work for almost everyone, and by my last year I very rarely did. The biggest thing is getting the shell fit and flex right based on what the customer wants from a boot, and making a good footbed. There’s lots of other techniques and modifications, but the best advice I can give you is to just be honest with yourself and your bootfitter and trust them to put in the work. If you want a race fit, you should expect to be putting in some time, discomfort/pain, and shop time before it’ll actually feel ok.