When I face a problem, I always start digging for the root problem - and - for the reason behind the whole problem branch I went down while searching for the root problem.
Well, this is nothing special and nothing new, pretty every psychologist does that with his/her patients.
What I understand now is: Searching for the reason of a problem is only relevant when the reason is still "alive" - if the source producing the problem is still "leaking".
Here is an example:
If you discover that you have a particular mindset that blocks you from being successful (such as "I am not strong enough, to do this or that" or "I am not intelligent enough for finishing university", ...), you might start digging how the hack you got to this prejudice or convintion.
The first question should be: Is this something old or is this mindset something that still gets fed by continuing (daily) experience?
After you got aware of a blocking mindset, you are already winning. If it is a relict of old times (maybe if you got punched by a stronger highschool peer or whatever) then you can be more efficient by not digging too much into the reasons. The reason is not that relevant any more if the reason has "fallen out" of your life already).