Other areas of sciences tend to have some "customer" outside themselves, where the sciences are applied. This also tends to be emphasized in the criteria for grant proposals in many domains nowadays.

IMHO the appropriate position of philosophy in modern academia would be as "metascience", i.e., their writings should be clearly useful to scientists across other sciences, they should be informative and relevant for people doing their own science outside of pure philosophy. IMHO it currently mostly isn't.