Well, making a silly youtube video for no reason is not the same as making a world where millions of sentient beings suffer/die for no reason.

Have you saw those YouTube videos about genetic algorithms teaching a thing to walk of fly? You may think: this thing do not suffer or feel any pain in repeating millions of times the same moviments just to fall on the floor less and less, no problem at all.

Advance a thousand years in the future and someone may happily simulate the world where you live among trillions of another things trying to evolve.

Yes and no. I'll agree that simulating a universe isn't the same as making a stupid video...

But I stand by my assertion that people waste a LOT of time doing stupid stuff.

There are projects that do AMAZING things and are spectacular. Then there is the other 95% of Youtube.

I'm sure there will be some AMAZING simulations... and then there will be the majority of them...

The real question in my mind... is which of those simulations are we in... an Amazing one... or a subpar one used for comparisons.

Simulating a universe like your own except simpler would let you spot-test solutions to problems, and study analogous of issues in your universe to greater depth.

We do economic simulations all the time, with weak-minded agents.