We've reached the point in scientific discoveries where you can't expect an apple falling on a scientist's head to eventually lead to an explanation (I know this story isn't true). The proposed theory is more complex and therefore requires lots of money. You have no idea what this potential discovery could lead to 10, 20, 50, 200 years down the road. And neither does anybody, it could be a steal. How much is the truth worth (or a glimpse at why things happen)?

By the way, what was the common man's response when Newton first explained gravity? Probably, "Things fall, what more do you need to know"