Sherryl Kleinman writes about everyday sexist language, discussing terms like "firemen," "congressman," "mankind," and "you guys." She says recognizing and dismantling this is important because it creates a society where male is the default and where men are privileged over women. She thinks that language that privileges men can be changed to create a more inclusive and welcoming society for everyone.
One major point she makes is that if you call your male boss a "chairwoman," then you'll be met with scorn and possible negative consequences. However, women are often made to accept default male terms. An entire group of college students are called freshmen, but if you call them freshwomen, they'll be upset at the term. Being referred to as a woman is an insult for a man, but being referred to as a woman is not an insult to a woman.
Kleinman says that regional practices aren't necessarily right. When she brought up the problem with "you guys" to people, they told her it was only a regional thing. She says that even accepted norms can be changed when they aren't the right thing to do.
She believes that some women are drawn to keeping the male term because it gives them a sense of being in the higher-value group. One example she gives for this is a fraternity that began to accept women; the women who joined wanted to be called brother rather than sister.