How are shows used to skulldrag dogs when 95% of shows end with one dog quitting in under 45 minutes? There are very seldom ANY skulldragging aspects in shows. Does it happen? Sure, but it surely doesn't happen often enough to say your dog has seen any bottom during a show. If a person wants to see gameness, then you're going to have to take it upon yourself most of the time to see exactly that. If a person wants to see if a dog can win, then show it. Those two don't walk hand-in-hand in any sense of the word most of the time.
Yes, eventually you may run into a dog that could have your dog quit, but that has so many different variables in regards to the quality of dog you're showing and the quality of the opponent.
I've never had an issue with doing things at home, because in the end, I'm more concerned with gameness than I am with winning a show. Winning shows are easy once a person goes out and sees the kind of dogs that regularly win. Showing dogs, to me, has always been about showing the absolute BEST dogs from the yard. The GOOD dogs can kick up dust and settle it at the house. I want the backbone of my breeding program to be based around and on dogs that have been under serious pressure and withstood that pressure. If/when I run into the BEST dog that may not ever see that, well, that dog has a place also.
All that being said, my original point was that true colors are usually seen a lot more readily at home than any show IF a person wants to see such a thing.