People will spend hours and hours researching their newest gun purchase but never take the time to conduct a test loading of their bug out gear into their vehicle.  People will spend hours comparing the XTP vs Golden Saber vs Hydra-Shok for their carry gun, but never work on drawing their weapon from their carry holster, manipulation drills, or shooting basics.  How much money is spent on QuickClot and trauma dressings by a person who doesn’t have any first aid skills, much less dental floss, Imodium AD and hand sanitizer? Instantaneous lead poisoning will kill, but so will bad hygiene and diarrhea. Gunshots are sexy. Dental floss to help prevent tooth decay is not.
 
JWR has often recommended making a dispassionate purchasing plan and sticking to it for this reason.  A recent example given was a PTR91 versus an M1A, and looking at the overall cost of magazines, etc.  A reason people often find fitness success with a personal trainer is because of this same principle. They remove themselves from the decision making process, and have someone else make a “purchasing plan” of exercises for them.