Silly typo, well spotted. Now fixed.

To your bigger point, my own perspective on this is there's nothing "immature" about enjoying stories of this kind through the eyes of a child, or getting in touch with one's inner child, or having a scintilla of nostalgia (seasoned with wisdom).

My Christian faith informs this view. Jesus said one must enter the Kingdom of Heaven like a child. I don't think he meant being child-ish but being child-like. There's a key difference. For me, the classics I mention in this article (such as E.T.) are the latter, not the former, and have their own wisdom.

I think the same is true of the Harry Potter novels, by the way (which I much prefer to the films). Yes, they have a nostalgic edge to them, in terms of remembering one's schooldays and whatnot, but they are about coming of age, courage, friendship, overcoming evil, and so on. I don't see that as a harmful story to revisit, again, with a pinch of adult wisdom.

What I do think is harmful is to exclusively live in such worlds, ignoring the other wisdom that can be gleaned from "grown up" stories (for want of a better expression). I'm dubious of people who sever ties with the likes of E.T. or other family classics on the grounds of them being "for children", but I'm equally dubious of people who exclusively disappear into Harry Potter or Star Wars or Marvel, and don't season their enjoyment with other stories that bring broader wisdom and understanding.

That's a bit of a ramble, but hopefully my perspective is clear. Essentially, I think for healthy perspectives on life, we need to learn to engage with all kinds of stories. :)