TL;DR: People be dumb.
We really need to stop calling it a theory, because the lowest common denominator has no clue what it actually means.
I understand why you’re saying that, but I would say that scientific terms shouldn’t be changed just to appeal to the lowest common denominator. That isn’t science, that’s PR.
Now we do have a lack of good science communicators. A lot of people don’t like Neil DeGrasse-Tyson, although there seems to be less hate for Bill Nye. We sure could use a guy like Carl Sagan these days though. I think what Sagan really understood and was able to do in a way that people who came after him just couldn’t replicate was getting people to understand science through the wonder of it all. To show them that the real universe is a far more interesting place than anything they might read in any book of fiction from thousands of years ago.
The real problem is in our technologically advanced and prosperous civilization, we no longer have true survival of the fittest to weed out the morons.