I think philosophy has to find gaps in what science can do in order to justify its existence. Some things are untestable -- what are we supposed to do with those things? There are qualitative and normative problems that science can't help us with.

I generally agree with you though -- we'd be better off if we just focused more on science, and describing things accurately, instead of just coming up with wild ass ideas. But it still is good to acknowledge and be aware of known limitations with that approach.