Just do it

I was once dating this American guy, who was also teaching me English. One evening, he offered to listen to a song carefully, in order to do some listening comprehension and discuss the song meaning. The title of the song is The Fox in the Snow and it is by Belle and Sebastian, a lovely Scottish indie-pop band.

It's a song about loneliness, uncontrollable (compulsive?) behaviours and life, I think, and at some point it goes:

"Girl in the snow, where do you go
To find someone who will do?
To tell someone all the truth before it kills you
They listen to your crazy laugh
Before you hang a right
And disappear from sight
What do they know anyway?
You'll read it in a book
What do they know anyway?
You'll read it in a book tonight"

The debate arose when we were interpreting the last four lines. In my opinion, the girl's scorn for what others understand and know about herself and life is emphasised by the fact that she can read it in a book: if it can all fit into a book, they must know very little! Moreover, it's a book she can read in one night, so it can't be that long, either.
Not so for Mr T, who held (together with some famous philosophers, he said) that nothing is worth doing that can be read about in a book.
Well, but isn't there more to life?