mmm... I'm not sure it is the writing that makes one feel better - I think it is the re-reading it! You've externalised the issues - which may sound fancy, but the brain is weird and takes external things as different to the ramblings in one's head - even when those external things are the same ramblings! Hence, keep writing - and reading - and you may hit on some key sentence that will lead you in a new direction.

I imagine there is a similar difference between music in the mind and actually playing it - one's reactions are different.