They're vetted by the hotel, there's regulation, command structure, security in the hotel, they have an incentive to not do bad things (They'd get fired), they're (hopefully) trained, etc etc

Additionally, if the hotel is a big chain, there's a certain standard of service you can pretty much be sure of across hotels.

So IMHO, people working for a company who are trained and employed to serve the public, are quite different to 'random people'.