A lot of people like to use Facebook as a political soapbox. That's not what I want out of it. I want to stay connected to people, hear updates, socialize, etc.
Some people push it so far that the solution of unfriending them is easy. But not everybody is so egregious that I want the nuclear option. (For example, relatives who are vocal about politics.)
Text classification is a thing, and there are many other techniques, so it seems possible to recognize political content with some reasonable level of accuracy and show me a lot less of that.
Maybe this would even go beyond making my own feed better. If enough people feel the same, maybe it would cut down on the audience size and reduce people's temptation to get on a soapbox.