Philosophy is a dead end. No single good thing has come from thought abstracted from everyday life. Those who really do good are those that live almost without thought, those who strive to help others with every action. Intellect helps no one. Intellect, even when true and pure in inspiration and just in its orientation, leads to political calamity, slaughter, abuse and a misguided literalism which destroys every good thing in the initial impulse.
But. The major problem really, is not the intellectual. This is the mistake that the Maoist revolution in China made. The intellectual is needed (desperately needed, if someone is to provide viable solutions to the dilemmas that now face humankind, and assist in constructing a world-view that will lead us into the future), but must be goaded into the service of just morality. It is moral considerations which must always come first, which must be the base for all further thought and action.
The major problem in fact, is when the intellectual is misunderstood. Those who do not share the sublimity of thought, then experience the power of thought in their (the intellectual's; the philosopher's) words, divorced from the extended world view which the philosopher inhabits. This is how atrocity happens.
So, what I should say is this: Philosophy is useless because so many are too stupid to understand it.