Big Question - Miss Peregrine's Home for Peculiar Children

In the "Miss Peregrine's Home for Peculiar Children", the author has major question if it is better to live young forever in the past. The children in this book, all the peculiar children are living in the loop under headmistress' care. Since there are lots of dangers that are desperate for their lives, they are meant to be kept safe under her property where there's no actual future. Thanks to that, children there are mostly around century old.
But the protagonist in the book, Jacob, didn't find that it is all fantastic and perfect to live like that. Jacob questioned if they are just all plain happy in the loop where time stuck into one day. They couldn't see any change in the world; history, technology, nothing. When Jacob expelled those new stories, everyone was amazed and curious. They were stuck in the old, past.
Also the peculiar children living in the loop, they were all playing and acting as children. They were reckless, irresponsible, and dependent. Human being, as they age, it should be natural to gain knowledge, grow responsible, independent and wise. But by living young forever, they still depend on headmistress' decision. Their knowledge stopped in where it was left off when they stop growing in the past.
Also they are protected by headmistress in the loop for good. They were young, physically at least, and never be expected to be a grown up. In nature, all the living things grow independent. The eagle throw its babies down the cliff from the nest when they are thought to be old enough and expected to fly. Many of other animals chase away their babies as well when they think their babies are old enough to take care of oneself.  Imagine that eagle never chase away and throw down its babies down the cliff. Those babies will probably never be able to fly and expect their parents to protect and feed them even when they grow up. In the loop, along with being young forever, they never get to learn how to take care of themselves in the world without their leaders. They will be expecting someone to protect, look after, and lead them forever.
The author tries to tell that it is not all that bad to grow old and flows with the time. Sometimes, stuck in the old day and being young forever can be more delicate.