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Given the following post, respond as if you're commenting on Reddit:
human
CMV: With so many dogs without homes, we should not be breeding any more pets

We put down thousands of dogs per year for lack of homes but we are still breeding labs, goldens, poodles, pugs, and other popular pet breeds.

Let's ignore puppy mills as almost everyone would condemn those. I am looking at the touted "ethical breeder". The ones who take the health of the animals as paramount and find good homes for their pups. How can we call this ethical when every puppy they home takes up space that could have been taken by a shelter dog?

A lot of these breeders show their dogs. The AKC doesn't care about health, they promote dangerous breed standards (looking at bulldogs in particular). Would it really be such a loss to stop showing dogs to fit arbitrary standards that us humans made?

I understand an exception for working dogs that must be breed for a particular temperament, like police dogs and service dogs.
gpt
>How can we call this ethical when every puppy they home takes up space that could have been taken by a shelter dog?

This is the flawed assumption at the root of your view. Not every space taken up by a bred dog could be taken by any given mutt. Some dog owners have allergies, special needs, different lifestyles, children, etc. that make particular breeds better suited to the home than others. 

>A lot of these breeders show their dogs. The AKC doesn't care about health, they promote dangerous breed standards (looking at bulldogs in particular). Would it really be such a loss to stop showing dogs to fit arbitrary standards that us humans made?

No, but saying we shouldn't have dog shows is different than saying we shouldn't breed dogs. Which view is it that you want us to change?