So rental car companies are "parasites" too because they don't "produce" anything? What about banks, for that matter? I'm not seeing widgets coming out of their

So rental car companies are "parasites" too because they don't "produce" anything? What about banks, for that matter? I'm not seeing widgets coming out of their factories so they're "parasites" too. Don't forget about supermarkets either. They're certainly don't "produce" any of the stuff they sell.