What!?! I want to dissect this a little.
There is a lot of implicit assumptions here. You are assuming:
1. That safety didn’t exist in her other world.
2. That the care provided by her original world is superior to the ones in the magical one.
3. That fighting for her life isn’t something she enjoys.
4. WTF is that last sentence. I’ll talk on that.
A. I think that assuming the fantasy world wasn’t peaceful is entirely misreading the story. “…she graduated from a magic academy and saved the world along side the hero.”
She didn’t just grow up there, she earned FAME, GLORY, and RECOGNITION. Especially as a scholar, this stuff is pretty important for one’s career. Being torn from it to be treated like a child again is borderline cruel.
B. Considering that most people believe her to be insane and allowed her to become NEET, the only person I really consider to properly care for her is the brother. Everyone else just isolates her until she complies. The fantasy word has her actually close friends/new family who do understand what is happening.
C. Considering that she fought in an Hero’s party and enjoys JRPGs, she must love magic and especially fighting magic. Being sent to Earth is the death of her primary passion.
D. I’ll make this blunt: that statement is not borne out of any understanding of the subject at hand, but out of pure and unadulterated ignorance.
You assume the people that had to do that are a monolith, that survival is the optimal outcome to strive for and they have NO desires to return. Well guess what? Many of them fail to cope with the changes. They turn to drinking and gambling to cope with these changes, and many of them frequently want to return to the land they were forced from. Just because SOME moved on, doesn’t mean ALL of them want that. And declaring that still being depressed 6 months after having 2 lives destroyed is “bratty”? Talk about being callus!
In addition, you mistake “abandonment” for “kidnapping.” She didn’t walk away because things became too tough. She was stolen from a place where she had friends, an accomplished career, and a bright future. Anything you can promise, she had already earned! Now she was ripped away and dropped in a world where most people think she’s delusional. Excuse me for thinking that most people would experience extreme difficulty in coping.
All in all, the mistake you’re making is failing to see the trees through the forest. Sure she was BORN on Earth in Japan, but her HOME is Gran Cadia. Simply going “ everyone else is NORMAL, why can’t SHE be NORMAL too?” is just being entitled.
