Liberty and democracy are not the same things.
Democracy means the majority decides what rules govern us. Liberty is the idea that we all have certain rights that cannot be taken away, not even by a majority. These are the “inalienable rights” of the Declaration of Independence, and when we give them up voluntarily, for whatever reason no matter how altruistic, what we find is all we have done is given more rights to the government that were intended for us.
Doing so makes us less safe, not more.