Good question. Feminism has a major affect imo. Women are impowered, as they should be, to be our equal. Outside of the “Western” world, women are lower than men in society. You already know how the middle easterns, Indian, African, Latin Americans and Chinese value their women. Because of that, women need men. Because of the need, they must attract us.
Black culture also has an effect. More than 50% of our gen (Z) comes from broken homes. The reasons vary but men didn’t raise their daughters. If your mom did it by herself, why can’t you?
Finally, “elevated” women want all their needs met. Most men are I equipped to do that. 3rd world women just want a provider.
At the end of the day, there are more than enough black women in the States for black men. Some men just check out and head overseas. It is what it is.