What is the core essence of human existence?

[Commander Kneewing]

And why do trans people think that people believe they don't exist if people don't give in to them?

 

[Frederica Bernkastel]

Ecclesiastes 5:18 - " Behold that which I have seen: it is good and comely for one to eat and to drink, and to enjoy the good of all his labour that he taketh under the sun all the days of his life, which God giveth him: for it is his portion."

And why do trans people think that people believe they don't exist if people don't give in to them?

You're making a mistake by caring what they think in the first place. Don't bother.