Did you miss the part where that paper was putting forth a hypothesis?
No one's claiming that all the questions about abiogenesis have been answered already. But the point is that those who try to imply that the process is entirely baffling, impossible, or has not proceeded beyond the Miller-Urey experiment are grossly ignorant of the huge amount of research and work that has been done in this field in the past few decades. In fact, the problem now is not that there are no plausible scenarios for the various stages of abiogenesis, the problem is that there are so *many*. They need to be tested and compared so that they can be narrowed down to the best candidates.
And if you read the papers, including the ones that are just putting forth new models to be tested, you'll find that a huge amount of evidence already points very strongly to specific events in abiogenesis, including a the existence of an RNA-based world. This would not be the case if life had actually been "poofed" into existence in its modern form, by a designer or some other method. So while a lot of the details are yet to be fleshed out, the evidence already points very, very strongly to the kind of natural "bootstrapping" sequence that the creationists love to ridicule and falsely claim that there is no scientific support for, or plausible scenarios for.