I am no clubfitter, but very interested. I learned from a good clubfitter that the most important spec to fit is the lie, then club length, then flex and swingweight.
My theory is that good players know how the clubhead should sit to the ball and will make adjustments to the setup to “get it right”, but they cannot adjust to the extreme.
Htting the toe? outside in swing ? Too soft tip that gives too much droop ?
There is an interesting system called True Length Technology (TLT) that calculates the club length to fit the lie (or vice versa) to give a constant setup position. But, adjusting lie is for sure about that with or without that system…to fit the lie to get the most consistent swing, setup, feel, golf…
I “hate” the type of fitting that says: “you are 2 inches taller that average, you need 1 inch longer shaft and 2 degrees upright ! ” That is pure *****y clubfitting. lie is the most single important individual thing that needs to be fit individually for each club by testing.