What is the benefit to being properly fit for my golf clubs?

Being fit properly has many benefits. If a player who is 5’ tall and swings a 7 iron at 70mph is swinging clubs that are standard length and x-stiff, they have no chance of performing a well-executed golf swing multiple times in a row. The same goes for the 6’5″ player swinging a 7 iron at 90mph playing clubs that are 1″ under standard and A-flex. Just having a shaft that is too light or too heavy for a particular player can have an adverse effect on the outcome of the swing.