Past life regressions can help find answers to problems in this lifetime for sure. In my work I usually focus on the issue or problem, and if past life comes up, then the reason hence the solution for the issue/problem is from there. If scenes from this life come up, then the reason hence the solution for the issue/problem is from this life. Of course there can be overlap. I often have clients wanting a past life regression because of issues or problems, but they are open to going back wherever their subconscious wants to take them, and often they actually go back to scenes in this lifetime. I think it is partly (or entirely) due to the fact that as human beings we are automatically suppressing and dissociating from trauma and stressful situations in our life that are often the reason for issues/problems in life, so when we are at the stage that we realize we need professional help, we don't have any sense or awareness anymore of the issues/problems having their source in this life.