The article highlights dataset biases that reinforce existing biases in society. It becomes a problem when ML affects the real world. See e.g. predictive policing [1].
The sex ratio at birth is actually slightly biased towards men, it takes a few decades to even out. Globally, there are also more men than women, but that's partly due to China and India being artificial outliers, in most countries, women outnumber men.
White women are the largest demographic in the US, but the US is only a small fraction of the world population. There are more Asian women in the world than there are men & women in the US and Europe combined, but this software fails miserably on Asian women as shown in the article.
[1] https://www.vice.com/en_ca/article/889xyb/over-1000-ai-exper...