I think people simply like saying 'it's a zero sum game'.. So, I'm not creating value if I build a real business on a neat domain name? If I bought MilkDeliver

I think people simply like saying 'it's a zero sum game'.. So, I'm not creating value if I build a real business on a neat domain name? If I bought MilkDelivery.com and launched a nationwide milk delivery service, I'm not creating value?