Breaking news: people of different genders have different preferences about price/quality tradeoffs in their shampoo and razors. Why is this surprising at all?

Breaking news: people of different genders have different preferences about price/quality tradeoffs in their shampoo and razors. Why is this surprising at all? Also, why is this discrimination? Seriously, my wife and I both like high quality grooming products. She uses men's razors, because they tend to give a better shave per dollar, and I use a brand of shampoo targeted at women after two past brands of high-quality men's shampoo have gone out of business due to lack of demand.