So your suggestion is to not make it easy for people who need to self-isolate because there may be idiots out there who would choose to go to a hotel advertising a service to self-isolators without any regard to the risk to themselves.

Guess what anyone who acts like an idiot in the current situation isn't going to limit their idiocy to choosing to stay at a hotel full of self-isolators. They will be partying on the beach if given a chance. And as others have pointed out in self-isolating the environment in which you self-isolate is pretty important if someone is going to be stuck in a room for 2 weeks. A balcony and a nice view is relevant to the situation.

Next thing people will be criticising the advertising of afternoon and morning teas in the package - "under the circumstances the hotel should only be offering 2 plates of gruel a day"