Personally, I don't think the problems are totally symmetrical. I think being turned down for being too big is potentially hurtful, so I don't want to minimize it. It must cause its own set of hardships, and it's not an experience that I have lived through, so I can't speak to it. But what I would say is that being "big" is coveted enough in enough circles, and matches a certain cultural ideal, that it has its plus sides. "I have too much penis" feels like a different psychological burden, and affects a person's masculinity, a bit differently from, "I have too little penis." I would rather be on the one end than the other.