And that's the impressive part. Finding this out cost circa $10 billion. To get that dough, they had to convince a lot of politicians (and hundreds of millions of taxpayers) that this was worth it.
To the general public, a clear result is much more satisfying than, "Well, gosh, the data is ambiguous; we need another $10 billion to get some solid answers." It takes a lot of integrity to go to the lengths they did. I salute them!