Very simple. Look at the equipment used at any disciplines National Championship. Now, I am an Indian not the Arrow guy, but be realistice. I have shot in these matches. No one, NO ONE, is there with the basic equipment to be involved in the sport. Do you need the absolute latest and greatest to compete? No, but you need a certain level of equipment to be competitive at the upper levels of any shooting sport. Will the best equipment make the lazy mediocre shooter relevant, nope. Nor will an excellent shooter win using a Daisy Red Ryder.
I think part of the problem is that your argument assumes that Anyone has the ability to win, it's just their access to the top tier goods that is keeping them from the podium. The folks who win do so because they put in the time with their equipment and have natural talents.
When we cherry pick the Nationals as our example, we are pointing to the MOST DEDICATED and talented shooters out there. Shooters who have put in the time and achieved the results which then allowed them to justify spending the dime (including the dime to attend that competition).
At the end of the day, the best equipment in the world is only worth a few points on the scorecard. If your that dedicated (or gifted) and your scores are that close to the Nationals, perhaps its time to bite the bullet, save a few shekels, and splurge on that trophy rifle you've been eyeing all these years. ;-)
I.E. it's only an arms race for those at the very top of the sport, and hard to even argue there as all the top competitors want the top gear anyway. Is anyone at the top of the sport even participating in this broader discussion? Or is this discussion amongst people vying for runner up?
I shoot Hunter FT with a Notos and a Westhunter scope. Granted, my scores are an irrelevant 30/60 average. Even if I had one of the Thomas' I compete against, I'd still be a < 40/60 shooter. I'll learn and tune my gun and body as best I can in hopes of being a 50/60 shooter. If I'm still having fun when I get to that level, perhaps I'll switch to a more expensive FT specific rifle. Or, perhaps I'll just buckle down and get the Notos to shoot a perfect score.
Let's pose the opposite point to the OP: If everyone shot exactly the same equipment, would we see different people at the Nationals? Or would the best shooters still be the best shooters? If the answer is the latter, then what are we even discussing here?
The whole discussion reeks of everyone gets a trophy mentality.
Cheers!