Well, I imagine most of the world doesn't have stick straight hair, but a majority of people have what Naturally Curly calls type 1 - 2 hair, but usually not with the difficulties of a fine hair strand. That's what I was referring to as small and niche. Most people, even curly/wavy can straighten their hair pretty easily. For us, styling is a huge problem.
I gotta say, though, I hate that argument about being something we're not. If that's so, then we should stop wearing clothes we like, clothes we admire on others; make up we like or make up we admire on others. We should just stop doing anything that changes our appearance. If you feel that way, then it's alright, but I love playing around with hair and make up. I think most women do. Having straight hair is definitely fun.