UHH profit margins are far greater than 6%. Companies with 6% margins do not grow market cap and shareholder value by 8000 % since Jan 2000. i.e the stock rise has risen 80 times from their ~$7 Jan 2000 price to around $560 today.[1]

[1] https://www.google.com/finance/quote/UNH:NYSE?hl=en&window=M...