The word is arrogant:-

‘having or revealing an exaggerated sense of one’s own importance or abilities.’

I choose not to. I can choose to be hopeful for the future without being unrealistic. I can see intrinsic value in human life and the human experience even knowing that every single one of us will die at some point, some peacefully, some during suffering. The moment of death doesn’t have to define one’s life. Even a baby who lives for six hours has spent infinitely more time living than dying. Would you be so nihilistic as to erase that life, just because it was short?

Your philosophy is valid; it’s not necessarily correct.
Starting from the assumption that it is denies you the opportunity to see things from a different perspective.

If, in some cataclysm, all of scientific knowledge were to be destroyed, and only one sentence passed on to the next generation of creatures, what statement would contain the most information in the fewest words? I believe it is the atomic hypothesis that all things are made of atoms — little particles that move around in perpetual motion, attracting each other when they are a little distance apart, but repelling upon being squeezed into one another. In that one sentence, you will see, there is an enormous amount of information about the world, if just a little imagination and thinking are applied.

Richard Feynman

So, if, during the apocalypse, you have access to a means of passing on a message to the poor bastards who have to live in the New World, it should be this:

“Everything is made of atoms”

You are under informed

Also my dad is a billionaire

The only dogshit I see here is your over the top aggressive name calling.