The Xin guang represents, itself, a freedom of design to choose from. For example, the Xin Yang is a type of decoration that allows the person to choose the expression they want.
While the Xin guangs are cars, they are more powerful. In other words, people like the idea of having Xin guangs as cars are more powerful, and people use the xin guangs as they are more powerful. Hence, some people like the advantages of wearing Xin guangs.