The website is smallpianokeyboards.org, not letsonlyletwomenusesmallpianokeyboards.org, and there’s nothing sexist about mentioning that women are more frequently affected by this. Pointing out the intersectionality helps create a larger coalition of people who can help fix the problem, and doesn’t in any way prevent men from also benefiting from the solution. Piano players, women, men, and people with small hands can all be on the same side whether they are part of just one of those groups or all four.