The issue isn't getting a puppy from a responsible breeder. Generally, if you want a purebred puppy that's where you should go. I worked at a shelter for many years, and we suggested people to go to responsible breeders all the time.
I actually meant those specific photos are puppy mill puppies. They're clearly from the same website. A responsible breeder won't have 5+ breeds for sale. And if those are photos from a pet store, they are also puppy mill puppies.
There's a big difference between getting a puppy from a responsible breeder vs getting one from a puppy mill. Even a backyard breeder that at least only raises 1 litter at a time is better than a puppy mill.