For better or worse, a great deal of humanities (especially philosophy) has been rendered defunct (i.e., it's "bullshit") due to advances in science. So before studying philosophy one should study science, so that one knows what to keep and what to discard.

There's nothing worse than listening to a young person who is an eager proponent of, say, "postmodernist philosophy" when you know that he hasn't a whit of knowledge about evolution or science in general. I usually mumble "that's interesting" and shuffle off to another conversation.

But your point is well taken: philosophy still has much to contribute - a great deal of it passes through the scientific filter unscathed. But it is important to study science first. Only then does one have a firm foundation for examining philosophy.