Comment by Asura 333 on World-Saving is a Skill - Chapter 3

@Asura 333   think of it like this if he came back with the power to end the monsters instantly then why would you read it. The female part maybe a fetish that the authors have.

@Sayori Because it would be boring to see him beating everything and everyone with just one move

@Nomi exactly my point

@Sayori one punch man?
its quite popular

@James.R I'm not gonna lie but this is my personal opinion of one punch man is just ok but bad since there isn't really anything to worry about since saytama will just end things in a win anyway

@Asura 333 Travelling between worlds comes at a cost. The greater the being travelling, the greater will be the cost. Take the example of moving a heavy object from point A to B. Lighter the object , less energy and force needed to move it.
These so called goddesses/gods of another world are powerful but not enough to bring in a strong being from another world. That's why they always go for some random weak guy from other world and train him/her to become strong.
The rules of a world doesn't apply to a being of another world so they grow quickly and easily.