No. Fairy tales don't answer Roger's scientific questions. Nor do oversimplifications.
Please re-read the article for this thread and take note of Roger's questions.
Well, I thought that you understood the implications of and the concept of extinction.
Let's try a thought experiment/story.
You are Australopithecus. One day you are dropped on a deserted island. You find lots of food and shelter and all those good things to make life bearable.
Then one day, you see, to you horror, another ugly bipedal thing step off a raft. He's bigger and stronger, and to your way of thinking much uglier than you. You hide. He is Homo sapiens, say a Cro-Magnon.
He finds food and shelter and all the things that make life bearable.
Then one day he sees you. He says, "Hey, what's that misshapen, pipsqueak doing on my island? He's eating my coconuts", and then thinks "I wonder what he'd taste like barbequed?"
You are gone to the extinction dustbin.
Implicit in all this is the obvious (although not necessarily always true) conclusion that the first of any kind into an ecological niche, is almost always not the best suited for that niche, but since competition is not as stringent it can do well. But as soon as someting a little more refined comes along - BAM, We have a winner (and a loser, by definition).
Does this help you see the "Why"?
BTW, my personal theory (unsubstantiated, of course) is that Neanderthal disappeared because Cro-Magnon ate him. I see no evidence to disprove it, except that some may have survived in the Democrat Party.
No. Fairy tales don't answer Roger's scientific questions. Nor do oversimplifications.
Please re-read the article for this thread and take note of Roger's questions.