It seems I perhaps misunderstood you and was dissenting against a strawman! Certainly, your second sentence accurately characterizes my point of view.

I remember that our textbook (Kostka and Payne's Total Harmony) had a lot of examples other than Bach chorales, and if I recall correctly the homework exercises did too. The composition exercise I remembered 20 years later was something vaguely similar to a Bach invention. That said, chorales were used quite heavily -- perhaps because they were the simplest interesting examples that illustrated the theory.

My professor wrote out music at the chalkboard during class; he even had a special chalk holder that held ten pieces of chalk, to produce a grand staff. I suspect that other types of music might be less well suited to chalkboard lectures, but that seems to be a trend in academia anyway. I'm a math professor, and we seem to be among the few holdouts in that regard.

Anyway, thanks for the textbook link, I will have a look!