I don’t think you’re “talking out your backside.”
I worked housekeeping, though not at Disney, and it’s a hard job. Some days are really slammed and you have to rush to get them all done. Rushing results in lower quality work. If you have fewer people, you’re going to have rushing all the time, even if the rooms aren’t being cleaned at the same level.
Please tip your housekeepers. If you’ve never had the pleasure of cleaning up after a stranger, tip for your good fortune. If you have, tip because you know what it’s like.