It's typical of popular accounts of Evolutionist and Old Earth conclusions: They do not bother with giving you any of their reasoning, it's only their conclusions stated as absolute fact.
"Absolute"? I don't remember that ever being the case.
Perhaps you overstate your position, or maybe you are simply projecting? If anyone is an absolutist around here, that would be you.
What is presented to the public is generally the current state of knowledge about the universe. I don't suppose you'd be as concerned if the 'six-day creation/global flood' story was presented as fact, would you?