Really depends on the dog. The problem is that people get high activity working dogs and then don't work them.

It’s not just the exercise but enjoyment of the outdoors and nature.

Not always that simple. I have a giant doberman. I no-shit threw a frisbee for this doberman 72 times yesterday (and ran with her three miles). She gets more exercise than the sheltie I had as a kid that ran leash-free in the country. And if you dare leave her in the backyard her whine could emit high-pitch frequencies that shake glass. She's a city dog that would be lost in the country without a human to hang with.