I think we can pretty safely say it’s not number 2. From what I found here transfem individuals slightly out number transmasc individuals and both out number ‘gender nonconforming’ individuals.

Of the 1.3 million adults who identify as transgender, 38.5% (515,200) are transgender women, 35.9% (480,000) are transgender men, and 25.6% (341,800) reported they are gender nonconforming

So more transfem individuals but not in the amount to explain the observed proportions in egg_irl.

I viewed it as an anti-joke for those suffering from gender dysphoria.

“Look at this grand journey that started in the ocean and has lasted millennia. What wonderful thing awaits us at the end? Gender dysphoria.”