Ugh. This view is, alas, very common, but grossly inaccurate. While it's true that philosophy is not usually axiomatic, neither is statistics, nor most of science. That doesn't mean it's not useful and you can't do interesting things with it.
Most of what we now know about the world came out of philosophy. As the ideas got more worked out they branched out and became their own disciplines. Mathematics, physics, biology, psychology, logic, even computer science, started out as things that philosophers studied. This is not surprising, since philosophy is, at it's core, just thinking rationally about things we don't understand in the world.
That isn't too say that all philosophy is worthwhile, a lot of it is useless mumbo jumbo. That is the difference of course between bad philosophy and good philosophy. If your ideas are not clear, or your conclusions do not follow from your premises that's as equally damning in philosophical work as in any scientific discipline.