@Zethuron because they are going to be in there for 100 years and that kind of necessitates time skips. It's a side effect of the genre having no sense of time scale. I wonder how many of the people they went in there to get strong enough to protect won't have died of old age or just been attacked by the time they get out... Anyway I'm going back to quietly ignoring the genre's time scales and number of effectively immortal people now.