Which point? It doesn’t seem like that is what the union is pushing for. I mean sure, they probably aren’t asking the hotel to forcibly clean customers rooms, but even doing it by default seems like the wrong direction. It should be on request. And the employees pay shouldn’t depend on the customers whims. It should be stable pay that they are asking for with the possibility of overtime.
Honestly, you don’t have to create a kill switch. Most stuff will fall apart due to dependency on manual intervention. Usually because there isn’t enough staff to automate it. Tech debt comes for everyone.