If there is absolutely no way to draw the connection with your personal concerns, and the fellowship requires an interview, don't worry. You'll have a chance then. Your argument, most generally put, is that you should win because you will particularly benefit from having relevant opportunity. Your job is to bring out vividly the various reasons why this is the case. Without just plopping an answer down, gear every part of your essay so that, along with each other part, your answer becomes crystal clear and moving.
Winners are often after something of greater importance, benefiting personally along the way.
Try to imagine as many of the details as possible, even if you don't present them in your essay. Good legwork shows that you are serious and willing to work. It also makes reading the proposal more interesting. Don't worry that you are committing yourself to the details of your plan. Everyone knows that things change.