And that's ok, but if we talk science specifically, it's a tool. A specific tool. And as every tool it was created for a purpose, and it was not 'knowledge for knowledge'. Technically speaking the very base of scientific method (empirical analysis and experimentation) was developed by Dominican monks to get closer to God through discovery of truth about the World, but I don't want to look like I'm preaching.

But the point still stands. We value science because of its results. Not because we like knowledge for knowledge. The latter existed since the beginning of time. Science did not exist since the beginning of time. It's an invention. A tool. For a purpose of getting 'truth' i.e. concrete, verifiable results.