We aren't so much failing to extract value from those traditions, we aren't even trying - because it's much easier and more fun to mock it all as self-absorbed non-truth-tracking ivory-tower nonsense.

There's a reason it is easier to dismiss some things as non-truth-tracking ivory-tower nonsense. A good one.

We are ignoring some vast intellectual currents here.

This is a feature, not a bug. (Although I don't necessarily claim that the set of vast intellectual currents ignored is perfect, just that there is such a set and that there is non-trivial overlap.)