Yet they are bound by many laws and regulations, beyond contract law and non-aggression, born of these instincts you malign, that (try to) prevent the worst of their greed. Laws covering worker safety, union-busting, antitrust and fair competition, child labor, truth in advertising, environmental protection, even requirements on the length and validity of warranties.
You have to ignore all of these constraints to arrive at the simplistic "greed is good" conclusion. A conclusion that implies not only that we should not add further prohibitions against newly-recognized "evil" behavior (e.g. web spying, devices locked against their owner, etc..), but also that we should remove the prohibitions currently in place.