For the most part, yes. Every philosophy concocted after the Hellenic period, definitely. Back then, though, philosophies were more than just mental masturbation, people actually lived by them. But yeah, all this post-meta-quasi-abstract-moderno-fusion-banana-sundae shit is just the bullshit university professors use to suck money out of universities.
It might have had some use back when science was just superstition and folklore, but now? Not so much.
I have read a lot of philosophers, but I just could not buy what they were selling. In the end, it came down to *their* view of the world. What qualifications did they have that I should trust them with my worldview? Granted, reading philosophy is a great place to start questioning the world around you, but as a template to base your life on, it's one big fail. It offers no real world, practical advice. Just a bunch of navel gazing.
I tried to listen to a Philosophy YouTube lecture put up by Berkeley, and I couldn't believe students paid good money to hear this professor drone on about abstract ideas I could have come up with during my morning shower.
Some people might interpret my reticence at embracing philosophy as having a closed, uneducated mind. Nothing could be farther from the truth. I just prefer not to expend my energy on something that will not benefit me in the long run.
jack, you have a point, also. School can be a life force sucking vacuum. At times, I ask myself, "WTF are we teaching this for? These kids will never see this concept after this week, except for the EOG" (the NC standardized test). Education needs a complete overhaul, IMO.