Most forms of democracy do not have a direct correspondence between "the will of the people" and the actual policies enacted. As another poster mentioned, tyranny of the majority is a thing, and robust democracies have evolved institutions to deal with it. Otherwise there's nothing stopping the majority from periodically voting the minority off the island, Survivor style, until only a single dictator remains.

In the U.S. in particular, there's strong respect for individual rights enshrined in the Constitution, and a key role of the judicial branch is ensuring that those rights are respected regardless of what the majority thinks. The majority cannot enslave the minority, for example, regardless of what the legislature votes. Nor can it deprive it of speech or free assembly, or guns, or a right to trial by jury.

That's why specialized agencies exist within the government body: FCC, FDA, etc.

aka leave it to the experts because the majority isn't qualified to make such decisions.