My problem with Jobs quote is that it seems to imply that learning math is somehow not learning. Thus I assume he means liberal arts not as in mathematics or anything practical, but as in a pursuit that is mostly not immediately practical as one might argue about modern philosophy.

Jobs'own technologies are often based on solid computer science principles. I'm somewhat surprised that he could recognize the utility of these technologies yet not recognize the source of them.

The quote could probably use a lot more context.