The nice thing about making diamonds as opposed to coal or bio-oil is that it's quite hard to burn the diamond, so less chance of someone getting tempted into using these enormous reserves that are just sitting there, depreciating, to fuel the helicopter of their bitcoin-mining luxury cruise ship or create an ultra-fast pizza delivery service using rocket launchers

Can you imagine the extraterrestrial archaeologist trying to explain that?

No - stupid slow speed of light stops so many interesting science fiction imaginations.

It's true that the speed of light prevents it from actually happening, but you should still be able to imagine it.

Reality is very much a bummer.

Some of those interesting scifi scenarios would not be so good for us.