Guests never see your cleaning roster. They see the lobby floor, the lift mirrors, the carpet outside their door and the bathroom off the bar. If any of those look tired, the review mentions it, and reviews drive bookings.
Hotels run around the clock, so standards tend to drift between shifts. The morning team does a great job, the evening crew is stretched, and on the weekend nobody is quite sure who owns the function room reset. Small misses add up across a long week.
Managers usually have enough on their plate with occupancy, staffing and guest issues. Chasing the cleaning contractor shouldn't be part of the job.