There seems to be a general consensus among...well, everyone, but especially among reddit users, that it's some type of "duty" to care about others. Especially women.

For example, I'm supposed to be concerned that women make 80% of what men make. Of course, we know this is mostly due to different major, career, and competitiveness choices among women, but let's say it actually was mostly due to discrimination. Why exactly am I supposed to care?