Incorrect. Orbital mechanics were not a part of the V2 era programs because they were sub-orbital with relatively simple parabolic trajectories. Getting a capsule back from LEO was not something that had been worked out mathematically until later.
No, it’s actually the opposite. Re read. If you compare an actually LEO capable vehicle and a moon lander of the same payload, you’ll see that the difference is not that big.
Saturn had a massive payload, hence the gap in difficulty.
But my point anyway was that Saturn V is not 1000x larger than a soyouz, despite the moon being 1000x further away. Distance is not what counts in space.