This is not truly a topic of great concern in my view, but a thought did occur that perhaps R2 programmed the capsule prior to its departure? After all did he not appear to be in control of its launch, etc…?
The matter, as I said, is settled by the novel: R2 piloted the pod. There’s no debate remaining. Sure, folks here can argue, if they want to, but they can also argue that the sky is green.