

I would imagine that it’s the easiest for the model to produce. Bold colours, clear and distinct shapes, that sort.
It doesn’t help that the companies have scraped the entire internet (which is a can of worms in terms of both legality and ethics) and then some, so it will mimic the advertising strategies employed everywhere (again, bold colours, clear shapes, etc.)
Putting bases on the Moon means we can do more studies, experiments, etc. outside of Earth, particularly tasks that are difficult to complete by current rovers. Human physiology in low gravity situations, lunar geology, possibility of water and life outside of Earth, that sort of stuff. I’ll also echo what others have said about how the Moon could become a launching base for future explorations, given its lower gravity and lack of an atmosphere.
There isn’t a conspiracy by lizard men to set up a Death Star, this is driven by the curiosity of humanity and our desire to explore the unknown. The “race” to have the first base between Americans and Chinese is, like during the Cold War between the former and the Soviets, a push to be the first, trying to show that they are ahead in terms of technology and science. In a nutshell, it’s driven by curiosity and, at least partly, national pride.