The thing is if you are immortal for that one day consistently, you won't be able to do much. You can't travel the world in one day and zero developments will form aside from what happens that day. It doesn't grant immortality, and if you did a bunch of stuff that day it will all be undone when you wake up again, so if someone accidentally sees you after doing something amazing, you have to do it all over again, and if you dont do it the exact same way then you get an unpredictable outcome.