What these competitors mentioned on the show is that they don't like the flavors required to win competition, so much so that they won't eat it themselves. Its a little different than saying that they don't eat as much bbq in general. They specifically said things like "this is way too candy sweet for me...", or "I would just use some salt and pepper instead, ...".
And funny you mention Franklin....When I bought my Green Egg, the dealer, who also competes, offers paid classes on competition cooking. I mentioned Franklin once to him, and he was so quick on immediately putting Franklin down saying "He is 'just' a restaurant guy, and comes in last in every competition he enters". At the time I didn't really understand how could that be. Now I do. Franklin, who is obviously a salt and pepper guy, has no place in competitions where sugar is an unspoken requirement. How could it be that a guy who supposedly makes such a famous and killer brisket doesn't do well in comp?