It is not a concept that is found in any mainstream religious beliefs or texts, so the question of why God would need a starship is purely speculative and based on individual interpretation. Here are a few potential explanations that have been proposed by some people:

1. God is omnipotent and omniscient: Some people believe that God is all-powerful and all-knowing, and therefore does not need a physical vehicle such as a starship to travel or communicate. According to this belief, God is present everywhere and can manifest in any form or location at will.
2. God is beyond the physical realm: Some people believe that God is not bound by the laws of the physical universe and exists beyond time and space. In this view, the concept of a starship would be meaningless, as God would not need to move or travel through space in the same way that humans do.
3. God’s presence is a metaphor: Some people believe that the concept of God is a metaphor for a higher power or spiritual force that transcends the physical world. In this case, the idea of God needing a starship could be seen as a way of personifying or anthropomorphizing this higher power in a way that is more relatable to humans.
4. It’s a fictional concept: It is possible that the idea of God needing a starship is purely fictional and was created for entertainment or artistic purposes. In this case, the concept would not be based on any real belief or doctrine, and should not be taken literally.

In conclusion, the idea of God needing a starship is not a concept that is supported by mainstream religious beliefs, and the reasons for this hypothetical need would depend on an individual’s interpretation of God and the nature of the divine.