Makes sense. Think of all the failed romances and personal endeavors Picard attempted during his seven years on the Enterprise-D. As stated above his brother and nephew dying violent deaths. Melancholy over past losses in his life. Action Hero Picard is a version of the thing that happens to many men when they feel like their goals in life are unobtained and out of reach. Change who you appear to be on the outside to make up for the person you're not within. So for a few years Picard becomes Rambo Jean-Luc who likes to wear tank tops.