> I don’t understand the meaning of the term “sex bias”.
This and “cultural bias” and “sexism” are all pretty well established terms you can Google, and are taught in social studies and history courses.
Sex bias means a cultural bias or prejudice based on someone’s sex. I’m using sex here more or less interchangeably with gender right now, but there are times where that distinction matters.
> it’s completely unclear to me that it existed previously and that I want it to stop existing.
There’s no question about whether sex bias has existed, nor whether society wants it to stop existing. Those are facts not being debated. The primary example I had in mind when I said 100 years is women’s suffrage: the right to vote. (https://en.wikipedia.org/wiki/Women's_suffrage) When women were legally barred from voting, or owning land, or initiating divorce, those things were sex based biases. Women gained the right to vote in the US a while ago, but it took longer before women started to appear in C-level corporate roles, that is still changing today.
> Cultural bias is about people from different cultural having different standards?
Please read the link I posted. Cultural bias is about having ingrained prejudices in large social groups. It can be, but is not primarily about people from different cultures in the sense of, say, Indians vs Americans. Indians have certain cultural biases, Americans have their own separate cultural biases. The idea that nurses should be women is an example of a cultural bias.
> What is the hypothetical ‘fix’, imposing uniform standards
The goal is to remove bias and prejudice that is hurting certain categories of people, preventing them from having equal access to opportunity to improve their lives, and to make decisions about people based on their interests and abilities, and to establish and respect some basic human rights across the board. I don’t know what you mean by “imposing uniform standards for judgement on everyone at all places in all times”, but this sounds like a straw man and that you’re skeptical. It might be described as imposing minimum uniform standards, perhaps.
I will turn your question back on you: what is the alternative you’re suggesting, do you support having different standards for men and women in QA? Why or why not? Do you support the idea that a woman developer who writes the same quality of code and works as hard and has the same level of experience as her male coworker should be paid the same amount?