>"Oh, really, that so?"

Yes, that so.

>"Nothing is ever needed if"

No, no "if", period.

>"all you can think about is the existential crisis in your head and the point of existing. If you simply want to live life in itself and enjoy it to its fullest. As Buddha has said, and this is verbatim, life is simply too short to worry about what can't be answered."

I see no relevance to that quote since I just answered it. We navigate better with the truth. (Partly since the truth will outlast life, the stars, even time and space.)

EDIT: And there is no "the point of existing" so I have no idea for what reason you bring that in.

>"So in short, yes, stuff is needed to exist and live."

That is a lie, partly because organisms do not "need" to live.  Humans are just too much of egomaniacs to accept that and grow from it.

>"Rules exist so we can."

Another lie.

>"In this world, there have always been rules and laws"

No. 3.4 million years of Stone Age, 6,000 years of post-Stone Age and not a single "rule" or "law" has ever existed outside the imagination. Same with chess, "crime' and "murder". Although... I guess chess arguably exists as an abstract thing.

>"We use them to navigate our existence and to be able to complete certain tasks and etc. The rules of chess don't float around the table, but Hikaru surely can't be a grandmaster if he doesn't know the rules, can he?"

Calvin and Hobbes can be "grandmasters" of their game of "make up rules as you go". The title means you've learned to play the game well but playing chess IS an entirely imaginary activity, two people can even do it simply through conversation. You and your best friend can make up a dance, i.e. "create the rules" of it, and become masters at it but you're performing an imaginary activity, the "rules" of your new dance never magically leaves the imagination, only the dance (arguably) becomes an abstract non-imaginary thing.

>"It could have ended" but sadly, it has not. I do not care about the fact you believe life on earth doesn't revolve around humans and life. If you have such a depressing selfless belief in your life, so be it."

So not being an egomaniac invariably is a depressing existence? I.e. if the universe does not revolve around you OH WOE IS YOU, WHAT A DEPRESSING EXISTENCE, HOWEVER CAN YOU GO ON?!

(Sorry if that is too agressive, I'm just trying to illustrate my stance about egotism.)

>"You are free to believe life is pointless and humanity is not the center, but what is life's point then?"

It doesn't have one, nothing does. "Purpose" is a myth.  (Proof below.)

>"I am not interested in leading a longer discussion than needed, to be quite frank!"

Nice one but reality remains; neither of us ever "need" to have any conversations  in our lifetimes, our parents could have had other offspring or we could have died a long time ago or life on Earth could have gone extinct before conversation was even feasible, hence no conversation ever "needs" to be any particular length.

--Proof of "purpose" being a myth--

I can use a hammer as a doorstop, as a paperweight, to scratch that hard to reach spot on my back, to smash a window to get out of a burning car or as a sex toy. I can use a dirty rock from a nearby ditch to slam a nail into a wall. That is the nature of utility.

 One brother can go into the woods to cut down a tree, lug it home, work for weeks to make a nice-looking comfortable wooden chair intending to sit in it by the fireplace reading Shakespeare. As he's finished he goes back out into the woods to cut some wood for the fire. His brother comes in, takes the nice-looking comfortable-looking wooden chair no one's ever sat in, chops it up and makes a fire in the fireplace.

 "Purpose" is a myth, it exists nowhere but in our imagination. It doesn't exist in hammers, rocks, trees, wood, chairs, fireplaces, fire, molecules, atoms or organic life.