For me, it's an issue of time savings as much as the work involved.
For example, last Sunday my wife and I spent four hours shoveling out our driveway so she could get out for work on Monday. We don't always have that luxury. Sometimes it'll be completely clear the night before, and we'll wake up to 6-9" on the ground.
It's not a big deal if I have all day to clear the snow away. But if we wake up and discover it has snowed, the faster we can get the driveway cleared the better, or else someone is going to be late for work.
Even with a snowblower, there will be plenty of hand shoveling involved around the cars, on the walk between the house/garage, etc.