Because greed allows us to ignore the fact we aren't accounting for the limits of this planet. We get to use greed to justify complete moral abandon, which in today's world can be really damaging. A few people are getting rich atm by tearing the world apart, it won't lead to good things.
But our system isn't designed to communicate the good around you to you, it's the opposite pretty much. The good is there it just doesn't brag, or shout or mock. It's quiet but it spreads. But you know when is is gone. It is conspicuous in its absence
Vance was in the chat too.