I was wondering as well. Unless it's a super active breed (e.g. border collie), the dog ought to be able to handle missing an evening walk (and even then, if they are well trained, they can handle it now and then). Dogs have a strict hierarchy, and the demanding, destructive behavior mentioned by the GP suggests the dog thinks he's pack leader and his owner is his subordinate. If so, destructive behavior when missing a walk won't be the only problem in the long run.

We train and board semi-professionally. We've got two huskies we try to walk twice a day in addition to training and play time. The dogs learn to yield to humans and to deal with their own emotions (e.g. boredom). We have two huskies we try to walk twice a day in addition to training and play time, but if we miss a walk, they wouldn't dream of acting out. They can 'ask' us for things, but if we say no, that's it.

He's a German Shepherd. Yes, I can get away with missing a single session, but he will be a pest about it, doing stuff like stealing my shoes or intentionally spilling his water bowl. If I make him sit or down to behave, he'll do it, but I'll get big, deep sighs and grumbles.

He is better than a personal trainer about keeping me on his routine. And he is a better dog after he's got his run in. Dogs love routines and are better pets when feel like they have a job to do.