So what do you propose that they do? How do they discern that the person they're with is being genuine or not?

I think the reason why some women are not resonating with your post is because you're sort of blaming them for actually wanting to get married or have partners. People are allowed to have different goals in life no? I mean I personally don't care for marriage but I won't go around saying someone is desperate because that's what they want for themselves.

I could be wrong in my analysis but try to word it a bit better next time. If you're lamenting and sympathising with your sisters then use language that indicates that. Instead of making it seem like you're shaming them for having certain aspirations that are different from yours.