Here Jacob illustrates just how much he’s grown as a person. He has the confidence to make his own decisions and not bow to Miss Peregrine’s ultimatum. Additionally, even though he has a new adopted family, he still clearly loves his biological family and wants to protect his dad in any way he can. Lastly, Emma’s statement that living in the house might be worse than dying illustrates that having protection and immortality is not worth the restriction and lack of meaning in the children’s lives; safety, in other words, is not the only thing that makes life worth living.