I don't question it and just file it away as a puzzle piece.
Do not fear death. It is the stake one puts up in order to play the game of life.
Madness string 19991
It is important to not promise kids things you don't intend, or might not be able, to follow through with! But there are lots of promises in the world that come with an invisible footnote that says '*Within reason', and it is a good lesson for your daughter to learn here.