So whose preferences should policy reflect? NGO presidents? Tech company employees in gatekeeper positions? Editorial column writers? Why these people and not the public? What gives them the right to rule?
Are you asking why america has a republican form of government designed to minimize the power of the majority of the population?
Well, partly because travel and communications were extremely slow when the constitution was written, but mostly because the rich land owners (and white males) were the ones writing it.