Ok, not impossible...impractical.
Do you think that a high-performing boot can have street shoe comfort? Do you think any of the people in the lodge or heading for the parking lot are simply unwilling to give up street shoe comfort? Some fit issues are people that simply demand comfort that inhibits performance and are unwilling to have their foot in a rigid, form-fitting enclosure. After you've explained to them how skiing is not compatible with that expectation of comfort, what else can you do?
As for finding a performance boot that doesn't hurt, what needs to be streamined is the process. It could become less esoteric.
Here are the steps as I see them:
- Identify your performance needs.
- Identify the shape of the shell that suits your anatomy and meets those performance needs.
- Get proper footbeds made (far, far more than 10% of skiers need them).
- Have your liner and shell adjusted to meet your particular fit issues.
People are inherently poor at judging their own performance needs and resistant to advice that undermines their ego.
Identifying the right shell is problem. No one carries every boot and damned few dealers will tell you they don't have the right boot for you and to go buy from their competitor.
Everyone needs a working footbed. Everyone needs a stable platform. Few people have a theorhetically perfect foot so for most people that footbed is going to need to reflect some sort of correction for either the anatomy of the foot or for alignment and balance, or both. Fast-food footbed purveyors (not naming names) provide a negative experience and bad word of mouth. People that haven't had good footbeds tend to not understand why they're important or what the difference between that and a bad footbed is.
With some luck, the person that can make you a good footbed can also properly fit your shell and liner.
The thing is that both footbed and fit adjustments are usually a series of incrementally smaller adjustments, honing an optimized result. The closer to slopside you are when having this done, the more convenient for you.
I doubt a good fitter can make a good living in Florida doing those incremental adjustments on a once or twice per season basis.
I understand your wish for off-the-shelf perfection. I'm not convinced it's a reasonable expectation. many approaches have been tried and abandoned.