Why are all the best books about China written by foreigners?

English books are supposedly written by foreigners and for foreigners. It means one author goes through all the hard work to write a book and publish what knowledge they have gained from China to sell them to their fellow people who have not yet been to China or wants to gain more insight about the topic but has very little resource or time. Chinese prints and books in Chinese words also offer the same, they have books all about America too and they are written by Chinese authors, now the difference is that they are not in AMAZONdotCOM because AMAZON is an English website. Try using a Chinese website and key in Chinese words to find Chinese books about USA written by Chinese authors.