Before you go around criticizing teachers, consider several things (at least at the high school level, which most of this criticism focusses upon):

Curricula often give teachers a choice of books, or specify which criteria the books must satisfy. If the curriculum doesn't specify Harry Potter, or specifies pre-confederation Canadian literature, you aren't going to do Harry Potter.

Even if teachers had complete liberty in choosing books, the lessons must reflect certain curricular outcomes. In the higher grades, this typically involves some form of analysis.

Even if teachers had complete liberty in choosing books, they aren't going to be able to find one boot that every student will like.

Having students choose their own books limits the forms of instruction (e.g. class discussions).

Having students choose their own books isn't practical. (Would you accept it if your boss told you to go home and do six hours of unpaid work each night? Why should teachers who refuse to do so to read all of those books be called lazy?)

Choosing books that lack appropriate support materials isn't practical. Lesson planning takes time. Support materials help to reduce the time it takes. (Calling teachers lazy for not doing everything from scratch would be like same as your boss demanding that you do everything from scratch on your own time.)