You should tell that to all the Creationists. Like the one on this thread who has a bit about it on his profile page. But you have just pointed to one of the un-scientific things about Creationism. Evolution is not in any way about the ultimate origin of life yet Creationists constantly make that the premise of their arguments.
It does seem to be a matter of extreme orthodoxy on the part of the evos, though.
That's your opinion. Some of them do seem to talk that way but anyone who firmly believes in something will hold to that view and it can be characterized as "extreme orthodoxy" I suppose.
I always love it when the evos “hand wave” around the little problem with origins... especially when their bible has that little word in its title.