Saving a few hours every week gives you some of your valuable life back. Time to spend with family. Time for hobbies. Or just time to relax. You know you deserve it...
It's one of those industries where the cleaners seem to come and go. Often you have to keep explaining to the new one what you want done...
You end up trying a bunch of them before finding someone you're happy with. This ends up getting frustrating and wastes a lot of your time.