Because if it wasn't for a complex network of trading & specialization, we would be in poverty. That network uses trade & profits to organize itself. Those machines and computers you cite are created and maintained by people who are seeking to make themselves wealthy. None of this is a given. Free trade and specialization is what gives us the abundance we have today. Your average North Korean or Venezuelan standard of living is what you would observe if you forced people away from free trade & specialization.
I don't think people appreciate how delicate supply chains are, or how much starving and poverty would happen if trade was disrupted.
Consider cell phones. The richest person in the world could not have a phone that they can carry in their pocket and make a call to another rich friend from anywhere in the world, if not for the widespread consumer demand that drove the construction of the cell phone system.
This is known as "bad luck.”
This quote assumes that what held true for most of history holds true today, when machines and computers can complete the tasks necessary for ensuring the flourishing of our species orders of magnitude more efficiently than ever before. Why should we assume that poverty would be the normal condition of man today?