Believing that a system that encourages and requires that exploitation is the best we can do is absolutely a capitalist idea, it's the ultimate ideological expression of capitalism: Liberalism. The belief that this is just how things are and there is no real alternative, and anything purporting to be one is just liberalism in a different hat.

You are subsumed in ideology. The function of liberal ideology is not to convince you of the virtues of capitalism, but to ensure you make no serious investigations into any alternative by pretending that everything else is just secretly also capitalism.