Every single entity (individuals, LLC's, corporations, nation states) within the system of capitalism operates as a rational actor. Each makes decisions to increase its wealth and capital and, collectively, these decisions and choices drive growth and increase the wealth of society as a whole.
Are there examples of individuals or groups of individuals who live in capitalistic societies but are separate from the system? Yes, but these are utopias and, if we all choose such a lifestyle, capitalism ceases to exist. I would like to suggest that if a substantial portion of Americans were suddenly to choose to live in such a way, the oligarchy would quickly recognize the threat, mobilize the power of the state and viciously attack such a movement.
If you believe this last sentence is over the top, I suggest you read a little history about the British Empire and India to understand the empire's response to the revolutionary efforts on the part of Indian peasantry to re-establish their cottage industries of cloth making and sea salt production.
And if you want to get a true sense of modern capitalism, I cannot recommend any book more than "Empire of Cotton" by Sven Beckert.