I disagree. I wrestled at a DI level in college, it was grueling, it was incredibly hard, some days I hated it. But it wasn't the same kind of burn out that I feel from software development. I don't wake up excited for work the way I would wake up excited to train. It's just different. The harder you work the better you get in sport. You may work harder at software development and become a better developer but the gains you may get aren't so concrete, you don't win, you likely won't even get a raise.