You can do anything mindfully or mindlessly. If your paycheck comes in contact with your personal development of a skill, and your freedom to explore its possibilities and your capabilities within that mindset, then yes I understand why doing your passion as a job might be tougher to wrestle with. But I think we must do this. Because if the alternative is to mindlessly do something we don't love, and spend our lives wishing we had more time to interact with what we do love, then we are trading even more freedom away than if we had made our passion into our work. It is your responsibility to maintain a mindful, aware, thoughtful relationship with your own skills. Do your passion for yourself, more than for your boss. Save your energy at work for your own time.