We are all ignorant.
We don’t know, how much we know about natural phenomena, it’s more than in the past, less than in the future, but definitely only a minuscule part of all there is to know. And every single person knows only a small portion of what we already know; even experts in their field fail to know everything that already is to know.
Add to that ignorance our limitations in knowing everything about our own creations beyond our field of interest: our sciences, our inventions, fiction, societies, ideas, etc.
Add our ignorance about our own history and present. Some discoveries we still will make, but other events that brought us where we are, will stay in the dark, because any documentation is gone or never existed in the first place.
And add the principle uncertainty about our ability to have complete and consistent knowledge, like Gödel’s Incompleteness Theorem states for math.
Then, we have already shown that our ignorance is epic and not completely curable.
But it still gets worse: we are not just ignorant because we cannot know, but don’t want to know or don’t care to or fail to know, because we think we already know.
The media, especially movies and TV, have done a lot to add to the last mentioned kind of ignorance.
Sure, most people know, despite what they see repeated time and again, that, e.g., there is no sound in space; but the group that can distinguish between fiction and reality is already smaller when we ask them about the asteroid belt: how many won’t picture a densely populated belt of rocks, even though we know that this is not so?
And the often unrecognized confusion by fictional knowledge only increases, when we enter the depiction of human societies throughout the ages and the life of individuals.
We will stay ignorant, because we can’t know everything, don’t want to know on occasion and prefer imagination whenever it suits us more.