Brad and Angelina are married. It presumably made them happy. And proffering that happiness to everyone is something well worth fighting for. One broken promise by two actors doesn't diminish, sabotage or weaken anything activists have achieved--or foreshadow a bleak future of continued bigotry and silenced chapel bells.
It is often said that the best things in life are the most simple and therefore the most under-appreciated. If you think of the happiest times in your life they are most likely to be around loved ones, when you were being creative or when you were giving of yourself. These have nothing to do with money.