I would have guessed the main reason is that you're going to sleep in a bed some distance from your house-- not having to clean is a perk. However, I'm always conscious to at least "tidy" up my room. The hotel staff definitely have a tough job. I don't need to ignore trash cans as well.
This is it, isn't it. Leave your hotel tidy. Trash in the bin, crumbs in the bin, stuff more or less where you found it so its easily made to look nice. Leave your used towels in a pile. Makes house cleaning easy and costs you basically no time or effort, and that keeps everyone's prices down.
And might make a cleaner sigh a bit of relief.
when I go to a hotel or airbnb etc (and yes, they are equivalent) the main reason for me doing so is that I have no intention of cleaning up after myself