I believe that children's exposure to whimsical ideas should NOT be limited in order to effectively prepare them for adulthood because children need to experience the different worlds and ideas that books can present to them. The worlds in books can be totally unique to children and it gives them ideas to use in the future. Whether the ideas are used for a game they want to play or something at school they need to create, it helps them think and create strategies that they might need. Children can also share these ideas with different people like friends and family.
It is proven that children who read frequently develop stronger reading skills and have a higher vocabulary. This is useful for them when they grow older and have to do a book study, read something in a textbook, read to other people, etc. Also, children who read have better communication skills because when they hear or read people conversing in the book, it teaches them how to approach someone or how to start a conversation and even teaches them proper grammar. Reading books with whimsical ideas may contribute to a love of reading. Children that love to read will probably read more in the future.
In conclusion, I think that children's exposure to whimsical ideas should NOT be limited in order to effectively prepare them for adulthood because it exposes children to new worlds and ideas, it expands their vocabulary, and they are more likely to read more in the future.