I don't know...how old the earth is, or how that question relates to my statement. Sounds like bait.
I don't appreciate someone telling me it's a fact that the earth is 7 thousand years old, or 7 billion years old, as if it's a fact when no one can prove beyond doubt either way. There are theories of evolution, of creation. Once you write one way or the other as fact, you are telling others how to think, and they tend to cease thinking for themselves. It's a kind of lie, to tell someone that *this* is how something *is*, when it isn't demonstrable fact.
I'll add that personally, I choose to believe in the theory of Creation, the Bible, the Flood, and that the earth is approximately 7-10 thousand years old. But I don't _know_ that, and can't prove it. After extensive reading of both sides of the arguments, it is simply the theory I choose to believe. I like the USA because here I am free to believe that if I want to. I hope this country maintains it's religious freedoms. But if I'm writing a professional publication, I ought to be careful to express it as a theory, as I certainly can't prove it.
So, I'm not complaining that they believe the theory of mass-extinction via asteroid - that's their prerogative. I'm complaining that they are pushing their theory as fact, when it isn't fact, but is still theory.