As you said, if someone can do something with this knowledge that the society we've built has rotten pillars, it's Elon or no one.

never been a better time to be optimistic or become a "maker" instead of a "taker".

We had a couple of classes with a similar conclusion at PA - it's a good time to be optimistic (as opposed to the perennial doom that seems to be put forward lately). What an important message to send to the world.