I think that we are the integrated sum of all of our experiences, and we often may not even comprehend how the thread of a particular event--seemingly "good" *or* "bad", viewed in isolation--wends its Iway through the core of our being & life.
There are episodes of Star Trek: The Next Generation where Capt. Picard wants to remove a young, foolish part of his past... Q allows it, and Picard is not a Captain, nor in the command set of officers, nor even a particularly good officer.
I don't know how great joys or sorrows, gambles taken or not taken, etc., become big in our lives, but it is something to soberly consider, if one were to consider such a "quick fix"...