Like is that a law or something? I'm not sure it is. They may choose to do this.
Compare to flights and trains, where there are laws. For example is cancelled and you've started your journey, they must get you home, by law (in the UK.) I was in a five-hour taxi ride once after a train was cancelled.
There was fresh fruit and chocolate, a kitchen, an office, a living room, and two bedrooms.
Often station staff will try their best to get rid of you and send you on to another station to make it their problem. And station managers can be hard to find. And they have sudden amnesia about the law etc
Obviously, exclusions to the walk policy are if you are banned at the hotel, or if you are walking in high with 3 prostitutes hanging off your arm, or any other reason that a hotel would want to refuse you because the hotel believes you will cause damage or disturb others.
If the staff at the hotel does not abide by the walk policy, you can call the 800 number to complain, and they will send you a check for your expenses and then bill the hotel.