It's all just a matter of abstraction. "In Chinese, a bus is called a "public wagon"..." Ok. What's "public"? What's "wagon"? Would it not be easier to use

It's all just a matter of abstraction. "In Chinese, a bus is called a "public wagon"..." Ok. What's "public"? What's "wagon"? Would it not be easier to use "all people carrier"? Then, what's "people? Since it's turtles all the way down, the article is picking an arbitrary (and comfortable) turtle to stop at and say, "this is the right spot".