I don't know what any individual should do about crossing her own borders. I only know that I live a happier, more adventurous life, by crossing borders.
I have said this many times, that there seems to be enough room in the world for mediocre men, but not for mediocre women, and we really have to work very, very hard.
The female of the genus homo is economically dependent on the male. He is her food supply.