OK, so many people have to get some sort of mentorship or guidance on issues in life in general...such as marital problems, children realted situations, etc...
You can go to licensed and trained counselors, very readily available these days.
My question is, would it matter that a personal with multiple failed marriages is counseling you on how to live a happy married life? Or a person who had a terrible relationship with her mom is guiding on how to deal with a similar issue? Is professional training in that area sufficient or life experiences important as well?
It depends if the person has learned from his/her failiure or was on right side in that situation.
Sometimes relationship fail due to one persons continuous bad behaviour and other person want to live or have a good relationship. That doen't make that person failiure.
It might be that person even on the wrong side but learned from his mistake or failed relationship.
It doesn't depent on the person or personality it depends on his advice. If his advice is good then his failiure doesn't matter or affect.
How have dealt with the similar situation can understand better all the situation and give better resolution or solution but again it depends on his learning, thoughtfulness and side he was in wrong or right both matters.
Good question.