I have never understood the appeal of flying to another Country, only to stay inside the hotel/resort......
Are you from a tropical location? If not, have you never desired a truly relaxing, do-nothing holiday?
I can do up to 4ish nights without leaving the resort except for a couple of walks. Pool and read all day long, maybe a spa, use the gym, and just generally chill out.
I doubt anyone uses all their holiday leave on it, but it's a great quick break.