I agree with 2grandaughters. The why will come out if you work the rest of the steps. If it's important to you to search for reasons while doing the rest of the steps I don't see any harm in it. We gotta do what feels right for us. Don't think there are any absolutes here.
Some people feel they'll be fixed by making right with themselves in the past - others feel the past is done and we need to learn how to live now. I lean towards the latter, using the steps to clean up what needs cleaning.