Earlier quoted context omitted.
I, for one, appreciate your enthusiasm. I mean, it's just amazing to look at how far man has advanced from just 100 years ago. And for me, it's definitely not about the destruction. I just think it's awesome to realize just what humans are capable of. Now, humans are also capable of some ridiculously destructive things. But the problem with @adriand's point of view is that it's as if there's something to be lost from…
It's pretty significant to us, because we're here :) Seriously, from our point of view, including adriand's, there is something to be lost from Mankind's destruction because it would be the end of our entire species. From the perspective of the universe as a whole, it may not be significant, but it seems eminently sensible for humans to be concerned about it. Also, it is possible that Earth is significant to the univ…
What if it had never happened? Now we now there were previous attempts at industry, like steam engines and chemistry, but there was always a war, a drought or some other disaster that destroyed the framework where said developments were made, and sometimes even killed the people making them (Archimedes for example).
What if the universe is just like that? what if we're the most advanced species and all the aliens out there are either animals or still haven't even figured out how to build clocks or engines?
If that's the case then all the knowledge that ever existed would die with us.