Greed is not a system, capitalism is.

With greedism, the distinction between systemic problems and personal values is lost.

That being said, the understanding of capitalism can be better explained by adding qualifiers, like

Rentier capitalism, monopoly capitalism, etc,

And understanding the differences with industrial capitalism.

The most sophisticated door lock is worth nothing if you have an open window beside the door.

Apple only needs to log keys, or tap the mic before encryption. And the CPU can also have a back dore.