> They are merely messengers who take the constituent direction established at the local level and travel with that message to deliver it in a country/state/etc.'s central gathering place.

No. That is exclusively an USA thing. I live in a representative democracy and I vote for the parliamentarian. Representative vs. direct democracy is about whether the people vote on laws directly or not.

> We (meaning most people) do not.

Most people don't want to write the laws, yes. They still want to have a say about the content. Most house owners also don't want to build the house. They still want to have a say what the construction company does.