Big dogs and thick brush myth

I don't care what performance animals that are being bred, only a low percent make top of the heap type of animals, weather its hunting dogs, race dogs, race horses, performance horses or whatever performance animal. The nose on some stock dogs was lost because of smaller improved pastures and you didn't need a dog to go find animals in big wooded places. If people had to go find then drive cattle 7 to 12 miles to a pen, they would cull most of the dogs people think are stock dogs. The quarter backing alligators would make driving cattle a mile an all day job.
The same with every running dog I've seen. Some can run faster than others and some do good to run 35 or 36mph. That's still fast enough to catch hogs.
People use to come hunt with me and say, man you got good dogs, and I'd think that's because you haven't seen all the sorry and mediocre ones. To me an average dog is like a fast horse, he will run just fast enough to lose your money, because a race horse will out run every time. Every breeding program tends to gravitate to average over time and some crosses work and some don't.