The vast majority of people who lift weights or exercise at all are just recreational. Even if they take it seriously and are strict with their training, it's most often done for fun. I doubt very many people who post on this forum make a living either directly or indirectly from the time they spend in the gym. So what's wrong with chasing a big vertical or a dunk exactly? How is it different from chasing a 3plate bench or any other physical goal?