beautiful nature

A girl has stayed inside a house her entire live. That house gives her everything she wishes for:
water, food, parents and oxygen. But when her parents go missing she needs to find a way to get outside the house and search for them. In her search she finds pictures, videos, so many things that she never expected existed about the outside world. But the question is:
Why did her parents hide all of this from her? and why hasn't she seen all of it in real life yet?
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My mother tongue is spanish so sorry if I make mystakes and please correct any mistakes on the comment section I really appreciate it. Enjoy :).