I'm saying media could be changed from this tendency, since this preference is less relevant in modern society and it hurts actresses. Media is a human construct that can be adapted to new needs, it's not a tool of natural selection!
Changing media wouldn't change the sexual preferences of men, and nowhere am I arguing this. It's like inclusivity in media -- is it ever going to eradicate racism? No, but it will make the world a tiny bit fairer.