The egg prime directive makes zero sense in a world of cisnormativity where nobody is allowed to explore gender and arrive at the conclusion that they are, indeed, cis.
Instead, everyone is cis by default, and for some reason some people on the internet decided it was evil to suggest to people showing non-cis traits or behaviors that they, indeed, may not be cis. Sometimes, if someone who insists they're cisgender hangs out with trans people, knows all the trans lingo and has opposite sex OCs and fantasies about being the opposite sex, you've gotta throw a reality check their way. It would be murder not to.
Yeah, cishet man, tell me how to interact in different social situations. Please tell me more about how cisnormativity isn't killing trans people left and right.