The WH is NOT the people's house. It's the President's house. A President duly authorized by the people to live in it.
And how lucky we are that he actually allows the peasants, serfs, tax slaves and general riff raft to visit it from time to time. Even if we are racists.
No doubt the dress code is outlined in the devine right of kings not to be offended by the silly dress of the common folk.
At least some of us can see that the emperor has no clothes.
Perhaps if the government paid as much attention to enforcing our borders as they do a silly dress code we wouldn't be in the fix we're in.