You are missing my point I think. Lots of data, sure. But no data with a proven link to performance.
The technology is undoubtedly sophisticated. The array of numbers on screens large. The lingo, jargon, and hardcore club tech buzzwords almost cultlike for the initiated. And certainly, fun for some.
But none of that makes the case :
Fitting=>better performance.
It might give comfort to someone spending 500 on a new driver that they have gone through a technological and scientific process to optimise that purchase for them. And so feel better about it. And even feel that it performs well for them and so they were correct to be fitted. But that in no way confirms objectively, fitting as being worth anything.
A very brief example of numbers….
I’ll assume you know what a high spin rate does to a golf ball because of the dimples and the aerodynamics involved.
High spin rate, ball balloons up = lost yards. Not ideal with a driver. Choose a driver/shaft that keeps the spin rate below 2000rpm, whilst still giving you the optimal launch angle. But how do you find out what spin rate you’re generating? Go and get fitted.
I really like the look of Mizuno blades but whenever I’ve been for a fitting for them it doesn’t matter what shaft goes in them I can’t get the spin rate down low enough to stop the ball ballooning up. Give me a set of Titliest blades, which are my second choice, and I get the optimal spin rate/ball flight. How do I know that? Because I’ve been for fittings.
It could be argued that a high spin rate with the short irons gives you a drop and stop result. Looks great but whereas you might get 120-130yds with the optimal ball flight and spin following a fitting, you might only get 100yds if you hit the ball with excessive spin. You feel like you’re really going after the ball but can’t quite figure out why the ball is going nowhere. It’s because the spin rate is too high and the ball is ballooning. And you get that data from a fitting.