Suppose that life starting is one out of multiple hard steps needed for us to exist. And there's a deadline of perhaps a billion more years before we could neve

Suppose that life starting is one out of multiple hard steps needed for us to exist. And there's a deadline of perhaps a billion more years before we could never exist, if we didn't occur by then. Then the early appearance of life is not evidence that life happens easily: all of the hard steps have to happen 'quickly' relative to how long they would 'naturally' take, or we wouldn't exist to observe this history. I think the paper explains this logic, going by the abstract.