I think the average user wouldn't care how it works, as long as it works. Only a handful of people understand the thing we nowadays call money either. Crypto must solve a real world problem to gain substantial use in everyday life. From my perspective, this premise is met. It only takes some time (and perhaps a financial crisis or two) for the larger public to become interested.
This is how I see it. As an investor and monetary activist
I obviously need to "understand Bitcoin". But for mass adoption this is not necessary. Bitcoin/ledger either works and serves as better money/memory, or it does not. If it does, it becomes the future and will be used by everyone (and everything I see suggests this is exactly what is happening). Most everyone will never understand anything more about bitcoin than they do about http - they will only care that it works, is safe, freeing and reliable. "Education" will happen on its own. Indeed, but it *does* take that kernel of people who thoroughly understand it to bootstrap it to the point where the natural benefits can permeate to more people. That's what's happened faster than I assumed it would.
As Wences says, (paraphrasing) it's more amazing for bitcoin to have gone from nothing to where it is today, than to go from where it is today to 1-billion+ users.