That is fascinating! I didn't realise that 'female-bodied' is now part of the unacceptable language because the sex of the body is to be based on a person's gender identity! I'm still learning this new science...
So biological sex doesn't exist at all. Clownfishes, we are, some of us farting away? But do clownfishes exist, as we don't know how they identify themselves? This is confusing...
So why would we have a concept of 'gender' then? If biological sex doesn't really exist and if 'gender' can be defined as the roles, rules and stereotypes a particular culture assigns people of a particular sex, why have gender at all?