What this is missing is that it assumes way too little structure. You don't have to generate a self replicating set of RNA. Many RNA strands (maybe most?) will

What this is missing is that it assumes way too little structure. You don't have to generate a self replicating set of RNA. Many RNA strands (maybe most?) will do something, so all you need is to generate a strand of RNA that will eventually produce a self replicating set of RNA which is likely much easier.