Simple bubbles formed from prebiotic polymer goo have no feasible way of naturally transforming into sophisticated functioning cell membranes. Unless the huge number of steps in between occur in the lifetime of a single bubble polymer 'primitive cell', that cell dies. This process of a self-replicator complex being encapsulated by a simple bubble, hugely unlikely in itself, therefore at best repeats on rare occasions with no incremental gain being able to be passed on. No integral relationship as exists in modern cells, could ever develop. An obvious show-stopper once one pauses to think it through logically. Commitment to the Darwinian paradigm doesn't allow that.