Had a good friend who owned a reasonably nice golf shop for several years, from the early-late 2000's. He always said that he made next to nothing on named brand equipment and balls, but gloves, apparel, bags and accessories were his big margin items.
Not uncommon.
He got out right before eBay made it impossible to stay afloat, not to mention the Golf Galaxy that was due to open a few years down the road 2010(?).
Don't know how many privately owned golf stores remain open today, but there can't be many.