The non-purpose is the thought that nothing matters or has a reason for being here.
There are things that matter to me.
Regardless of what decisions you make, you'll eventually die and blink out of existence, so what point is there in anything?
I regard the question as nonsense. I have not yet died and blinked out of existence, so I have the rare and wonderful opportunity to experience the whole universe. I even have the ability to change that universe in some ways. I can create something that didn't exist before. Why would I squander the opportunity just because none of the things that matter to me are eternal?
You could say that the point is to live a good life and have an impact on people after you're gone, but what do they matter? They'll blink out of existence too, as will everyone else.
So what? In the meantime, THEY will have the same extraordinary opportunity I currently enjoy. If I can make their experience even better than mine, I'll enjoy my time here even more.
If [...] there's no afterlife, we're just a bunch of robots existing for no reason until our systems fail. Your friends and families are robots too that don't matter. Any emotional attachment you have is just evolved constructs of the brain trying to maintain social structure.
If there's no afterlife, this opportunity is all the more precious. An afterlife transforms "this life" into a dress rehearsal, a holding action until we can get on with the "real thing," whatever that is.
Those who think this life is nothing more than a closed-book admissions test to eternity are likely to be squandering the only opportunity they'll ever have to make a real difference in the lives of real people. Why bother to make things better in this world, when perfection awaits just beyond the veil?
And yet, look at the remarkable life we're able to live today, because of the cumulative contributions of uncounted billions of people who are no longer alive.
Sorry, I just don't share your despair. Purpose is what you make it.