Context: (transcribing meme) Girlfriend's mom dropped this one two weeks after I graduated: "So when are you getting a real job?" -Mom has not worked a single day in 20 years -

I found this on the front page, and I wanted to re-post because I found this to be sexist.

It's not like we live in a society where women do not have the same, if not better, opportunities than men.

Yet the archaic perception that men must "be the breadwinner" still exists. Why is this?