For instance, when you say you don't want movies to be political, you are assuming that everyone you communicate with believes that "politics" constitutes the same things you do. When a map has lines for national borders or certain names for countries, they have taken a stance on what is true about where those borders are and what that nation is called. This is very recently been exemplified with the "Gulf of America" fiasco. When map makers go and change the way they label the Gulf of Mexico, they have taken the stance that indeed, the President of the United States can just rename a body of water from the name its had for over a century, and by not changing it, the stance is taken that they cannot do that.
But it can get more obtuse and simple than that. If, say, a sitcom depicts the main characters as a family consisting of a Mother, father, and their biological children, who live in a house they own, both of the parents having jobs, and all of the children having their own rooms, those are all political stances about how a family should or could look. If none of those aspects are ever questioned, then it is taken as a basic assumption that the audience will see this setup and call it as a "normal" family. If a show has a different family setup, like, maybe, a single father with children and they live in a trailer park, but they exaggerate this way of life as difficult and isolating, however true that is, it is also a political stance about that family structure and living situation.
The point I'm trying to make here is twofold. Firstly, that Politics aren't just the actions of governments, and isn't just when minorities appear on whatever screen you happen to be watching. Politics is the basis of society, any society. People have base assumptions, and they share those to build complex societies where they will then debate on the things that aren't the base assumptions. Often times these base assumptions are cruel and racist, but also ennumerated amoungst these assumptions have been such things as "Murder is bad" and "adults shouldn't in intimate relationships with children" although one of those is a lot newer than the other.
Secondly, Politics shouldn't be something that scares you all the time. The discussion can be uncomfortable, doubly so if you take everything personally, but challenges to the base assumptions that build society is really the only way for the whole thing to move forward, and for us to create a better world for those who come after us.