Not every one has seen, and many prefer to stay ignorant. And many that have seen prefer to stay with their belief systems rather than accept the evidence. That's life. At least that's life until they start to realise their belief systems look foolish and they are in a minority.
Then belief systems quietly change. We are there now.
The evidence has been there for a long time. Acceptance of a discomforting issue and changing comfortable beliefs takes a bit longer.
