It seems to me that if a property cannot provide a published benefit it behooves them to disclose that fact at check-in thereby giving the guest an opportunity to conduct themselves accordingly. If at check-in the hotel says, sorry, we cannot honor the 4pm check out because of reason x, y, and z then I can make alternative arrangements if the 4pm check-out is important to me. It's also arrogantly presumptuous to state across the board that the late check-out is unimportant. What's not important to one person is critically important to another. Each person's circumstance is different. The most obvious one is that you have comorbidity and shouldn't be traipsing around in public for an extra two hours during a pandemic, particularly in an area where social distances and mask-wearing is not observed.