As far as the setting itself comes, LT was never particularly praise-worthy when it comes to general sense and integrity.
1. It's an isekai. The MC is a character from "our world" transported to the game world.
Ehhh, if you go deeper into the main storyline of LT, you eventually find out that
you never actually strictly "left" your world, but rather than that the ENTIRE world got "transformed" when you interacted with the mirror in the intro sequence retro-chronologically (I mean it was made so that history of the world was changed itself as well). Or some other convoluted shit like that which was frankly a lot more retarded than the standard isekai scenario.
2. There is some mechanic that stops characters from just killing each other. Or at least massively disincentivises it. Maybe a mental/psychic combat system?
The rare case of a classic reversal of the standard values - the "violence bad, sex good" scenario. We can't diverge into guro/ryona becaue that's icky so we need SOME kind of reason to justify why hitting people with an actual fucking sword doesn't eviscerate them. It's uhhhhh, magic! Magic, of course. The blade/gun/fireball doesn't wound, it just "hurts" haha, you "beat" your enemies into submission before you struggle-snuggle them, haha :^)))))))
Well, that's still better (or is it?) than the necessary justification for not including children existing in the grossly oversexualized world, to avoid any spicy pedophiliac implications/allegations/inclinations/
temptations.
In the case of LT we also use - you guessed it - MAGIC!!! Babies simply grow up into fully mentally and physically functional adults in a manner of hours (minutes ?). WAOW! That sure isn't fucking stupid.