As a child, I never had a treehouse, though I desperately wished I did. It could have been a hide-out, an escape. A place to play with my various zoo animals or read a book. Magical. Fun. Inviting. Quirky. Nature.
I never had one as a child. And, whether or not the individuals who constructed these treehouses had them in their past or not, it didn't stop them from building them.
They make me wish fairy tales were real.