Why Are So Many EFL Textbooks So Bland, Boring, and Culturally Tone Deaf?

Why are so many EFL Textbooks so bland, boring, and culturally tone-deaf?  Allow me to ask a more polite question. How can English teachers working abroad and international English textbook publishers both respect local cultures and create more engaging English classroom lessons? The challenge may be more complicated than you might suspect. A long, informative, and detailed exchange on a TESOL...