Katvon The person who did that presentation is autistic and they became distressed when questioned about their content. As they are obviously vulnerable it is almost impossible to challenge anything without being accused of bullying (and worse). They have tweeted about the event if you are interested.
The other things that appear to have been challenged on the day (that came from different contributors) were;
The definition used of Lesbian : A woman (or woman-aligned person) who is attracted to other women (or women-aligned person)
The use of the genderbread person
And intersex people being used to demonstrate that sex is not binary.
I linked to this slide on another thread. It is a satirical graphic designed to highlight unnecessary surgical interventions on intersex children.
This appears to have been used at the conference by a Doctoral Research Fellow in a presentation that gave an overview of the scientific literature on the formation of gender identity.
Some of the stuff being peddled to a vulnerable minority really does terrify me and being unable to question anything because it comes from the same vulnerable minority terrifies me even more. If I were the parent of an autistic child/young adult, I would do everything in my power to prevent them coming into contact with such twaddle.