It is in some cases. Take the first players who were using the Pro-V1. The ball was an advantage in and of itself. Nike introducing their own line when they gave Tiger the NexCor club face to launch. No one else had those. The M3 and M4 drivers compared to those using Callaway is another difference in clubs with other players on tour. There's more than a few instances here.
Is it a coincidence that Sergio signs with Callaway, drops TaylorMade, and is now using Callaway to make his equipment? His wins speak to the truth.
Look. I've hit with a Brassie, a Spoon, and a Mashie (including the mid-Mashie.) I've hit with wooden shafts, metal shats, and grew up playing with Persimmon woods. I've played stiff, regular, and flex shafts...several different iron faces. There's a distinct difference in clubs then and today. The fact some players get to used more advanced technology before others unevens the playing field.
You want to talk about balls now? I couldn't count the number different brands around the house I've used and now just carry for balls to hit in the water or the woods when waiting on the box.
Hell man, it was an advantage for players wearing Footjoy when they changed the design of their shoes to resemble more of a tennis shoe versus a saddle oxford. Everyone wasn't sponsored by FootJoy. It was an advantage to guys whose shoe sponsors started selling new spikes versus the old metal--easier walk.
I'm really left shaking my head a bit if you don't see how equipment really gives guys an advantage--especially when your brand (TW) is the only one that has that item.
It's hard for me to imagine that all these world-class players thought Tiger's success evolved around his Niki equipment and then didn't go out and sign with Niki themselves. Instead, most of his competitors were more than satisfied to dig in with Taylormade, Callaway, and Titleist for all those years. Amazing amount of boycotting for such extraordinary clubs and of course Niki is so successful they get out of the golf equipment business in 2016.
This would be a case of you taking what I said and rewording it to a point that it means something completely different. I never suggested his success evolved around his Nike deal. I said there was equipement he was using that others didn't have access to use. And yes, at times, that's an advantage. I don't want to assume you're trying to be obstinate here and I tried to eliminate that possibility by citing several examples of how players on the tour get advantages over others--balls, shoes, and hell even clothing. (Still lost on why Phil is wearing shirts like that on the course.)
You seem to be making light of a point without considering a player can't just say, "I'm quitting TaylorMade and going to Nike." The old contract thing carries a lot of weight with endorsements.
These companies did adapt after some of the breakthroughs. When Titleist launched their Pro V1 series only those that were sponsored by Titleist were using them. It's a great tour ball and has distinct advantages. That lead to the TaylorMade Tour Preferred, the Callaway Chrome Soft and their SR series, Bridgestong got in the game with a heck of a premium ball as well as Srixon. There's more than a handful of others.
Nike hung their entire golf line on Tiger. By '16 their stock was as bad as Under Armor is today--the bottom fell out. Why? I suspect a lot tracks back to a certain 9i in 2009.