What? Have you ever seen physics? I’m a solid state physicist and half of that field is completely obscure to me. I can do semiconductors but stuff like superconduction, X-ray measurements or even organic semiconductors are my limit. What do you think I know about black holes or quantum field theory? Probably hardly more than an average person from the street. And that are just the “popular” fields. Who the fuck knows what people do in the quiet corner Laboratoriums of the world.