It took along time to convince you didn't it Jerry! JK
I don't think people are promoting a dog here. Just think that a cur dog which ever type you hunt, can do it. They just as ourselves have to be pushed to do so. Work the track till they get it hot enough to where they will take it and go with it.
Starting pups you sometimes walk near a tank and see that the hog was there 30 min ago. All the signs are there. Tank is murkey, where he got out. The ground is still wet, the tree where he rubbed still has wet mud. The pups might walk around follow it for 50 yds and come back. Walk the dogs in there, push them to take the track. You will find that doing this a couple of times and they start to understand what you want them to do. I know that most of us do that, but the same goes for wanting a dog to take an older track. This is something I believe in. Push em beyond what you expect them to do, and sometimes it will really payoff.