It seems to me to run counter to the democratic idea that an individual’s opinion matters. Either individuals are good at forming their own opinions from the world and voting is the practical realization of that into a government, or the electorate is an unthinking blob to be managed, as it will only vote for that for which it has been sufficiently inundated with propaganda, in which case the whole election is somewhat of a farce to begin with.
Why isn’t the will of the people (given an equal opportunity market for people to buy mass media advertising) respected more?