I agree that clothes are made to fit specific people. Americans have bigger butts than Chinese. Black Americans have much larger butts on average.
It used to be that shoes came in several widths: A, B, C, D, E, EE. But lately the length is all you need, and they fit just as well, if not better than they used to in the 1950's. I guess they are better at shoe design than they used to be.
Hair dye is almost certainly the same for everyone. The best hair dye for the money, I have heard from both White and Black women is Bigen, which is made in Japan, I assume for the Japanese market. Bigen sells its dye in small bottles, while other brands put a small bottle in a large box. This gives them more shelf space and apparently more sales. Women buy one brand when they use it themselves, and normally leave it up to the hairdresser when they have it donr.
It just a marketing ploy in many cases to make gender and race specific products . Marketing ploys are logically bogus, but they sell because people are not logical.
I observe that there have been few attempts to sell race specific deodorants, though there are a lot of people who think people of the other race smell worse. I suspect that this belief is the reason why this has not been a successful marketing ploy.
My experience is that people smell one way or another because of what they eat. If you are a vegetarian, you tend to stink a lot less. There is a significant difference between crowded buses in the summer in Argentina (where people eat lots of beef) and Mexico (where the poor don't eat much meat).