Philosophy can be much more than merely something that helps one to "think more clearly", although it does serve that role. I personally think that this aspect of philosophy is overdone in modern times, and other aspects end up overlooked. (I blame modern academia.)
I agree. Modern academia hasn't done much for poetry either, other than to drive it into the hands of the people.
Ethical philosophy is about values, and it can inspire one to change one's pattern of living. The only limitation is that one needs philosophy-inspired art and stories to make that inspiration available and motivating for most people. Few people are motivated by philosophical argumentation alone, though this does happen.
It's more likely to happen to people with analytical sorts of personalities, which would be a minority of humanity. This is (sort of) one of my arguments in favor of religion, in that philosophy seems unable to make the appeals that work for most people to inspire them to improve themselves and the world in general.
(Obviously one can talk at length about how religion can inspire people to do the most heinous things, but that is another thread.)
In classical times, western philosophy was a way of life. It came with spiritual exercises to practice daily, forms of meditation, communities of interested people to learn from and grow with, and other things besides. We've lost this. Or, rather, this was absorbed into monestary life when Christians started to dominate the cultural and intellectual landscape. The philosophy that we see today is a ghost of its former self.
This seems to me to be a relic of Western history. I don't assign it to the rise of Christianity though, but rather the rise in a far too literalist view of one religion combined with politics that put religion into opposition with the rise of Western scientific thought.
The laity in the West had ample spiritual exercises they could perform also, in ways not wholly unlike Eastern religions. The East has monasteries also, but most people are not monks. But the East did not have this epic divide between religion and science that produced a materialistic secular philosophy.
I don't view the rise of a split between philosophy and religion in the West as due to any particular theology as much as a confluence of, hrm, a metaphorically-challenged hermeneutic combined with a power structure that was wholly unwilling to cede any political influence.
There is also the accident of the Western vs. Eastern worldview that seems to have been extant since our ancestors spread in both directions from Central Asia. The Western worldview has been known to be kind of heavy on the reductionism. Reductionism sometimes doesn't leave much room for diversity of thought.
In short, I view the reasons for the split between much of philosophy and religion as having the same genesis of the alleged opposition of science vs. religion.
A religious power structure in the West gave little room for intellectuals to maneuver, so they seem to have reacted largely by doing what they were going to do anyway, but outside the Church. They didn't have much other option at the time.
We're left with this relic of our history and it still creates divisions today.
Personally I think it's high time we find a way to heal the rift.