Do politics belong in art? Well... it depends. Whether its identity politics or hot-button social issues, Hollywood loves to preach, but audiences don't want to listen. What they want are good stories. Those stories can absolutely be political, but the politics of the narrative need to be neatly woven into the story. If they are ham-fistedly shoved into the script, most of the audience will reject the activism on screen and find something else to watch.
Writers, directors, studios, etc... need to do a better job actually establishing their own personal philosophies and working forward from there, seamlessly integrating their worldview into the themes of the stories which they create, designing the narrative around their ideas, not just dropping in random, obnoxious lines or story beats or randomly and pointlessly race or gender swapping characters.