I agree with what you're stating and I hope that that's where we are headed - there just being man, woman, and non-binary gender identities. For now though, as I see it, cis/trans become relevant in three ways (off the top of my head):

1. Medical situations - self explanatory
2. In pursuance of romantic/sexual relations - society is still at the stage where the visual perception of a person lead to certain presumptions. Not everyone may be okay with dating/having sex with a person who has different genitalia than they presumed that their partner would have.
3. [This point is my personal opinion] The visibility of people openly owning their journey can be a source of information, give courage to others who are undergoing the same journey and are scared or confused. I knew about my orientation way before I realized that there's a term for it or that their are others like me.

I hope I got your query right.

More so as >300 out of those 500 are believed to be Pakistani nationals trying to flee the worst economic crisis their country has seen in decades while the son of a Pakistani businessman felt compelled to splurge that kind of money on a bonding exercise.

Come over. I'm sure I can cook you some diarrhea-inducing food. It'll be spicy as hell, so sweating and peeing gets sorted too. And I'm sure it's not going to be easy to find.

Ability to successfully persuade any living being to do what I want them to do.