The general population won't want to see it. More fuel for a documentary. Situations don't even make good news, and especially not good movies, yet many screenplays are formed around a situation. What people care about is the situation's impact on people. Topics and themes are other words for situations.
Abortion is a topic.
Communism is a topic. Freedom is a topic. Religion is a topic. Unconditional love is a topic. You might have strong feelings about any of these, but topics are nothing until you show the impact they have on people.