Another world might be wonderful, with powerful magic, strange adventures, and beautiful beast-eared girls or princesses from another realm.
But another world isn't actually all that wonderful. For starters, how do you speak the language there? What if you have no talent for magic? What if you can't bring yourself to train in swordsmanship and build up your body every day? What if you catch some otherworldly disease? How would you treat it?
In short, there's this poor unfortunate soul, an ordinary person with nothing special about him, who transmigrates to a world where magic is everywhere.
Only, the story's supposed to be about adventures, meeting beautiful girls, and face-slapping the arrogant.
Why is it about beauties, war, and fire instead?