Club Fitting is for everybody, not just for single handicaper and pro golfers. Club fitter not only measure your swing data but also your physical characteristic.
It's like being fitted for your suit and pants..... you do it overtime to make sure the golf clubs still fit.
It can be confusing if the club fitter always offer shafts with different weights. I recommend to see a Golfsmith certified club fitter instead of just a sales person.
I have reshafted my driver at RBK GOLF SHOP (
www.rbkgolfshop.com ) and they always ask my feedback whether I gain any positive results or not.