There's something a lot of straight people end up doing called homosociality. It basically refers to the upbringing men and women get trapped in where they think they can't have healthy, emotionally-secure, platonic relationships with the opposite gender.

To cope with the need for these kinds of relationships, they form them with their friends of the same gender instead. These are their true emotional confidants, the people they can be vulnerable with, while their heterosexual partners loom as these fundamentally and esoterically different beings, creatures from another planet that they have to navigate strange and foreign norms with. Men are from Mars, women are from Venus, after all.

There's something a lot of cis people do that is really similar. They constantly affirm and construct their genders through everyday activities that they have normalized as gender roles. For example, the cisnormative standard that women should shave their legs and armpits has not always been around. According to the Women's Museum of California:

Hair removal was encouraged through the efforts of three different industries: the women’s fashion industry, the men’s hair removal industry, and the women’s magazine industry, each of which recognized and sought to profit from women’s new role as consumers. First, hemlines rose, threatening to reveal hairy legs. Then, sleeveless garments bared arms. Exposed limbs in the changing fashions of the early 1900s pressured women to shave armpits and legs.

Rather than accepting the natural fact that their legs and armpits grow hair, they are shaved in order to affirm the gender experience being sought. Women who don't are not only seen as more masculine, but may even feel more masculine, dysphoric from the internalized standard of the gender norm, unless they actively reject it and are willing to be seen as more masculine by the norm's adherents. To live completely outside the norm would necessitate living outside the society producing it.

Sometimes gay people joke, in reference to the almost romantic nature of homosociality, that straight people are gayer than they realize. I've been finding it pretty funny that cis people are more trans than they realize, as well. They prop up the plastic surgery and anabolic steroid industries while claiming some biological truth that they don't end up embodying, accusing other cis people of being trans because of the toxic beauty standards they have created. If cis people could see their gender affirmative rituals for what they are, perhaps there would be a lot less hostility toward trans people.

References:

1. Eve Kosofsky Sedgwick — Between Men: English Literature and Male Homosocial Desire
2. Women's Museum of California — The History of Female Hair Removal
3. @ICanSeeForever1 via Twitter (via Nitter) — a post demonstrating that Dr. Jane Clare Jones, who criticized the Women's March for adding a silhouette of an allegedly trans woman with a larger nose to their logo, has the very same type of nose