It’s extremely hard to square the basic premise of this article: capitalism was created so that passions wouldn’t result in autocratic regimes, with the apparent retreat of liberal democracy across the western world. It’s also hard to square this hypothesis with the re-entrenchment of authoritarianism in countries recently exposed to capitalism, such as China & Russia.
Eh be careful of talking about capitalism in terms of it being “created” it perpetuates one of the old lies of capitalism: that it is an inherently rational system (in your formulation, a designed one).
Capitalism grew organically out of evolving practices around markets and trade and redoubled and reinvigorated itself through works of economic theorists like Smith, who argued it was “rational” because of certain of its properties. However it is important we get away from this notion of capitalism being somehow a “rational” thing since it has bred profound economic irrationality through the inequitable distribution of resources, leading to irrationality in other spheres as everything is reduced to abstract exchanges (see climate change)
Edit: This criticism also applies to the OP article, which also falls under the spell of representing capitalism as some sort of intentioned system.