.us is not the “root DNS” and your misidentification is muddying the waters.
.us is a TLD (Top-Level Domain) and more specifically, a ccTLD (cc = ‘Country Code’).
https://en.wikipedia.org/wiki/.us
And the English Wikipedia says that its registrar is a subsidiary of GoDaddy named “Registry Services, LLC”.
The root DNS servers and registry are not run by GoDaddy or a subsidiary.
https://en.wikipedia.org/wiki/Root_name_server
They are operated by important entities. Not companies that release sexy commercials featuring Danica Patrick. I keep getting confused between GoDaddy and Carl’s, Jr.