"Nobody likes learning for the purpose of learning."
I do.
I do.
For example I'm learning new things out of belief that doing it will improve my life in some way. I liked computer science because of the thrills of building things, and I keep on learning to break my own limits, always wanting to build better applications / algorithms. Seeing the results of my work makes me really happy (that's not too uncommon among us developers I believe). I also liked math in college because I've always enjoyed solving puzzles, and for the satisfactions of doing it before the others did.
Is this not learning for learning's sake?
PS: Our brains aren't designed, 'that way' or any other.