Of course it isn't, This isn't the biological gender, This is the Psychological gender, We all know the difference,
It's when someone psychologically doesn't feel like they belong in the biological gender they were assigned on,
Such as Transgender (Who are more comfortable in opposite gender) or Non-Binary (It means "Not in the Male-Female binary", It's for people who don't feel comfortable in either Male or Female categories, Thus, They use pronouns such as "They/Them"), Simple as that, They agree that their biological gender remains the same, But still live their life with a more peaceful category