It is one of those “stop doing x” memes that are usually some blend of tongue-in-cheek and outright surrealism, and they always end in “they played us for absolute fools”. Here is an older example of the meme:

Or if thats not the part that confused you, binary genders would be just two genders with no variations or differences in the gender of any two men, or any two women. It is a perspective that is antithetical to progressive/modern understanding of gender in culture, and the trans community generally opposes it. Trans communities usually prefer the idea of a gender spectrum, where masculine and feminine are the opposite ends of a gradient, but even that can recieve criticism for excluding Agender people.