Had roofers redo the roof awhile ago. I checked the lawn for errent nails thinking I'd find none or two. It went from mildy to infuriating.
If you can get away without and start on another job sooner. That's my guess anyway. I only did high end roofing and there's no way we would finish a roof in less than a week. But some businesses are based on doing lots of jobs fast instead of big expensive jobs. So I guess they feel they aren't getting paid to care about that.