You would not have to use textbooks in a collegiate setting and your views would be respected.
New, part-time, or adjunct teachers who do not have tenure cannot select their own text books. Most teachers of ESL must go along with the Chair and the majority decision who elect texts that the students will purchase. It involves the bookstore, as they want books that sell.
If there are low enrollments for certain sections of ESL, those classes will be canceled. If everyone is on the same page, fewer books will be returned, and costs for the bookstore will be reduced, as these books can be held over for the next semester.
Only teachers with tenure can choose their own texts. However, these tenured professors teach multiple sections whereas new or adjunct instructors only teach one or at most two classes.
Besides Pearson is a monopoly. Go check their website. They control the books and almost all collegiate tests (like PSAT, SAT, and GRE) that most students must use.