That's how science works. It is always still working on its arguments. It is always assailable. But saying that abiogenesis is indefensible is as silly as saying that evolution is indefensible. It was once, until the evidence was collected. Give us a chance to collect the evidence before you proclaim things impossible.If it is still working out its own arguments because it hasn't navigated a path to the demonstrstable, it has never left the realm of being assailed by certain attacks for which it has no defense.