Well, one person's "greed" is another person's "Laws of Economics." One cannot really envision a situation in which the world's biggest market is somehow ignored or purposefully deprived by the world's biggest economy. Remember that capitalism is amoral. And secondly, China's masters have become adept at playing the same game of sympathetic governance and benign control of their people that the West has come to accept and tolerate. As long as they are not outwardly committing evil acts, and say the right things in public fora, the West will continue to do business with them.
Lastly, by relinquishing its manufacturing and industrial capacity, the US has become unable to define the trajectory of business engagements with China in the field of infrastructure. The Germans have stepped in to fill the void.
I'm sure drug dealers, abortionist and even pimps use that excuse to justify their evil ways.
Remember that capitalism is amoral.
Since Humanist Ludwig Von Mises and his various Libertarian/Ayn Rand Objectivist followers such as Ron Paul have become involved in American economics, capitalism has become not "amoral", but "immoral".
Capitalism (the free market) works best with Christian-Judeo ethics used. If you don't have Biblical based morality, then more government (the government that Libertarians like yourself HATE) will take it's place.