We are here because by a random galactic incident, a star was blown out and took with it debris that cooled and became planets, including this one. Over eons, life forms moved from microbial to swimmers to crawlers to walkers, to upright and here we are.
Beyond that, I guess we are here because we are. What we do with that is up to us.

OK, it's late and you're gonna get weird shit at 2 in the morning! Smile!!

I read the question: "Why are you on this site if you believe in magic?"

To answer your actual question: Life has no inherent purpose. "Purpose" is a human being thing - exclusively. The universe is not a human being, existence is not a human being. They do just fine with no purpose, and they will do just fine without us.

because of a perfect storm with everything coming together the right way at the right time

We are here because we were born. The sad thing is that so many think it must be much more complicated so they start making things up. This way they will present themselves as the person with all the answers when you talk to them.

So I will take this question as a Zen Koan and just hold up a flower ?

Because organic molecules became self replicating and increasingly more complex.

42

No reason, no reason at all.

No condoms

Personally, I think we're here to create. It doesn't matter if it's art or carpentry or or technology. Once your basic needs are met, adding to the world is all we've got.

Why? You ask this questions as if there is an insightful answer looming around the corner. Why is earth here? Why are there stars in the sky?

The same reason there are billions of other planets and stars populating the universe: science.

Whatever reason it takes I guess.
.
To me this is asking why does grass grow.

I can respect the question "how." But "why" assumes a cosmic will and intent that I have seen no clear evidence for, so it is purely speculative. Here are some other "why" questions we could waste our time asking:
Why do some live a day and others a hundred years? Why is there horrendous suffering? Why do terribly cruel and selfish people sometimes seem to be rewarded?

To take out the garbage.

Why are we here as in this website or the universe? The answer is the same either way… Because it was there.

We are here to be the universe observing itself

"We" are here because if it were only "Me" I might get lonely having only the birds, beasts, and fishes to converse with. Not that they do not make fine and enjoyable companions, but their somewhat rudimentary vocabularies render them rather poor conversationalists in matters of physics and philosophy which interest me. Also, I have come to appreciate and find pleasure in the musical and artistic creations of my fellow human beings, so I am content to share a bit of my vast Universe with them.

That would be a philosophical or theologian question. “Why are we here?” Is not an objective question. How do you quantify it? I don’t see that there is no “why” or deeper “meaning” to life. Life is what you make it, you make your own meaning to your individual life. Or maybe as a famous Poet put it: “O Me! O life!... of the questions of these recurring; Of the endless trains of the faithless—of cities fill’d with the foolish; Of myself forever reproaching myself, (for who more foolish than I, and who more faithless?) Of eyes that vainly crave the light—of the objects mean—of the struggle ever renew’d; Of the poor results of all—of the plodding and sordid crowds I see around me; Of the empty and useless years of the rest—with the rest me intertwined; The question, O me! so sad, recurring—What good amid these, O me, O life? Answer. That you are here—that life exists, and identity; That the powerful play goes on, and you will contribute a verse.” Walt Whitman

We're here because we're here because we're here.

because consciousness needed a host.

Here to use my brain, talk to people with common interests and possibly meet a man for a long term relationship. Traveled and spent time with fellow member resulting in friendship.

Biology

I'm here because I was tired of being trolled by the alt-right on the last two Facebook groups I joined. I since ditched them.

I get trolled a lot here, also, but luckily, there's a "block" button.

It seems that many here object to anything I say about the supernatural or gender issues, LOL!

The purpose of life is to beget more life.

Life goes against the probabilistic direction of increasing entropy in the cosmos. Information is the mathematical negative of entropy(Shannon). Genetic code is the information that defines an organism. Mixing that information begets baby organisms(more life)

Our mind/spirit/emotion/psychology is our conscious life which contains orders of magnitude more information than our genetic code. Mixing our consciousness through conversation/bonding/love mixes the information in our consciousnesses and begets consciousness babies e.g.social constructs, languages, traditions, memes, cultures, tribal knowledge, etc.