Wrong end of the stick. It's not a question of fitting the courses in to the students' schedules, it's a question of fitting the courses into the teachers' schedules and the available resources.
The faculty is limited and so are the classrooms and textbooks. If Mrs. Throatwarbler-Mangrove is teaching "The Bible as Literature" during second period, she's obviously NOT teaching "Contemporary Film Studies" or "Geosciences" or "European History" during that time. Which means that students who are interested in European History don't get to take it at all, unless you hire another teacher, which costs money that most school districts don't have.
Every stupid elective you put into a curriculum is one less available intelligent elective. Of course, that cuts the other way, too -- every intelligent elective you put in is one less available stupid elective. That's the question being asked. What course are you willing to give up -- what would Mrs. T-W be teaching otherwise -- in order to offer "the Bible as Literature"?
I know. There were (at least) two ways to look at the question, so I picked one: the student's schedule.
Talking about the school's curriculum, I still stand by the position that one can't teach everything, so as long as core classes aren't threatened, I'm not much concerned if Bible Lit is taught as an elective. I take exception to the notion that teaching the Bible as
literature is stupid.
Without an understanding of the Bible, including its history and "sources," students cannot fully understand (comprehend, relate to, connect with, etc.) much classic western literature. I defy one to "get" Dante without ever having encountered the Bible, much less Chaucer, Shakespeare, Milton, etc.
To me, not having a Bible as Literature class is a lot like not teaching mythology just because those myths used to be someone's religion.
I mentioned this thread to one of my colleagues who is also atheist, and she informed me that our (non-Texas) school could also teach Bible as Literature if it desired, and that she wished it would. It would make her job generally easier, because she would no longer have to teach Bible as Literature
while teaching classic literature.
IOW, it's already being done quietly in many HS classrooms, and some folks simply aren't aware.