I think you're taking it to a bit of an extreme. There's soooooo many other ways to exercise pets without a walk. That missing a walk or choosing another way really isn't the end of the world, end all. This is just my opinion, you can have a different one. My parents never walked our large dogs, but they had plenty of other activities. Field running, swimming, hunting, kids to play with. They had plenty of other ways their exercise was addressed. So for me jumping to the conclusion that a walk-less home is unfair or a bad home just isn't something I personally agree with, when there's so many other options.