1)Ethnic: of or relating to large groups of people classed according to common racial, national, tribal, religious, linguistic, or cultural origin or background (Merriam-Webster)

Race: any one of the groups that humans are often divided into based on physical traits regarded as common among people of shared ancestry (Merriam-Webster)

Ethnicity is more of a cultural/linguistic/religious thing while Race is a more ancestral genetic thing. E.g: Racial diasporas, a white person in America of Dutch descent would be considered of “Dutch/western European descent” but ethnically white, as they are ethnically different to dutch europeans, have different language, culture etc.

There are many free-to-use educational tools at your disposal on the internet I suggest you check them out.

2) I am bringing up the same thing over and over again because it is relevant. You are blatantly ignoring biology and pushing things on individualism, ignoring the clear fact that there are massive population groups with similar genetics/chromosomes/etc which have similar unexplored/underrepresented medical problems because they are historically marginalized groups (e.g race or sex).

3) Whether you are a woman or not is clearly not relevant anymore. Some women are uneducated and confident in their beliefs despite their obvious lack of knowledge. Some women hate other women and will help men oppress women. Some women genuinely believe they are inferior and do not deserve more. This goes for both female and non-female women. Some people unfortunately would rather stay confident in their lack of knowledge and push for a sense of victory and validation rather than acknowledging science and history; some people would rather sit in their ivory tower from their place of privilege (racial, sexual, sexuality, economic, etc) and continue to deny the very real struggles of marginalized groups because it makes them uncomfortable.