As someone who studied philosophy (among other things) I think that view is a little bit simplistic. Philosophy has given up the idea of the one universal truth out there that you just have to figure out for a reason. A lot of what surrounds us is a matter of perspective to such an degree that trying to figure out one objective (and maybe on top logically sound) truth behind everything is not just ridiculous, but potentially outright dangerous.

I'd be the last person to argue that there is a lot of trash in philosophy. Hermetic stuff that revolves around itself and simulates complexity of thought through choice of words. There are definitely many pearls as well.

90% of everything is trash, that's true nearly everywhere.