I think you are overstating the risk of pound dogs... As much as the other poster is overstating the evil of anyone intentionally breeding.
All dogs need to be taught to live in any home, whether you buy them as pups or get them from the pound. I've found that like most people, most dogs are pretty resilient to rough treatment and pretty forgiving and flexible in new environments. Most people ~don't~ compete in dog sports, nor are most contributing to the betterment of the breed. They are looking for a pet dog, and even if they are looking for a particular style or breed, most people should not be reluctant to look for that pet at the pound. The dogs there certainly deserve the home.
We have rescued 3 Great Danes. It is a risky thing to do, because you can't be sure of the temperament of any rescue dog, nor know what health problems are lurking. It took us two years and a great deal of training before our sons could come in the house without being threatened by our last rescue.
Although he is now a sweet dog, I have resolved that our next Dane will be raised by me and come with health guarantees.
If it's a small local pound, such as the one in my parents' small home county, that's one thing. The nicer dogs are even fostered out with employees, they cull the vicious ones and the ones with debilitating health problems, so your chances of getting a problem dog go way down.
Now if you live in or near a big city, they cycle them through on a weekly basis (and euthanize most) and make no attempt to assess the dogs. Everybody knows this, so the breed rescue societies make DAILY trips to the pound and try to save the dogs that are obvious purebreds or breed type. So in addition to having no attempt to cull sick or vicious dogs, the cream of the crop are skimmed by the breed rescues. . . . then you really ARE rolling the dice with what's left. And that is the pound situation that I've dealt with most of my life.
I sometimes forget that not everybody lives in or near a corrupt big city. Sorry!