Dub detail?

In the firsts episode, it's dubbed that aqua says "to help we decided to send young people who died in other worlds to that one and let them keep their bodies and memories"

I found it a bit strange that all the gods collectively think that a task of hard work should be put on the burden of young people, but not only that, Anime fans like Kazuma who might know a bit more about the world but really nothing else to survive

It would be easier to install the knowledge of anime into an old person and revert their body to its prime since it does say that they "let them keep their bodies and memories"

Meaning that the physical form can be altered when needed or reincarnating