wertigont

In humans and other mammals the immutability of sex is a fact, not an opinion. We are not a species of sequential hermaphrodites.

The cultural artefact of people identifying themselvee as the opposite gender is a different type of concept to this. It's more of a sociological or psychological phenomenon.

The ask for the former is to have competitive spaces that are designated specifically for female athletes. This of course implies that all male athletes must be excluded, regardless of their identity claims.

The rationale is the same for both: to provide opportunities for women and girls in an otherwise male-dominated space. Neither should be controversial.