We have a statement here "can't see the forest for the trees". We are so wrapped up in the sitch that we cannot see it clearly. That is why it is easy for most of us to provide clear and concise advice to others while getting wrapped around the axles on the smallest of issues when it comes to our own sitch.
That is why you must learn to detach. It will help you to see you own sich more clearly. And you are completly detached from other's sichs so that is why it is so easy to give good advice