My understanding of Buddhism is that the goal of enlightenment is a personal ambition, achieved via introspection, dedicating time to personal development, mindfulness, meditation and quiet reflection.
What if you come across something that you consider is worthy of your time and devotion and you feel is better use of your time than your own personal situation? There are examples throughout history of individuals devoting themselves to others, often at the expense of their own personal condition. Does the betterment of life for some, or all, people make it worthwhile sacrificing your own path to enlightenment, and does it make any difference if you are knowingly doing this, not causing yourself suffering through doing so, or have an overwhelming calling? Time in this lifetime is limited, there are only so many hours in the day.