Nobody is just one thing. Intersectionality is about finding common ground where everyone feels like an island. Discussing the small stuff doesn’t prevent anyone from talking about the big stuff.
Case in point, being a man with a part time, invisible disability, there is a cultural expectation that I will lift heavy things, engage in sports, or give up my seat to a woman or elder. And I do these things, sometimes with great physical pain, because it’s easier than explaining to people why everything hurts without sounding like a whiny malcontent.
My experience is not universal, but many men can relate to the societal pressures to conform to what a “man” is supposed to be. Sharing my experience might help another person recognize their own biases and expectations, and to empathize with people who might exist in another space.