That tension is nothing new. Where I teach now, I work as faculty in the writing and rhetoric department, and our GAs come from the English department, so our GAs are mostly literature and creative writing graduate students. Many of those students see the teaching of freshman composition as a necessary evil, though they look down their noses at it and hope never to have to do it again after they finish their degrees. So many of them have this attitude because they reflect the attitudes of their mentors. Of course, not all literature scholars snub comp/rhet in this way, but it's nothing new, and here's why:
Most incoming first-year students take Comp I and II, which can generate tons of revenue for whatever department administrates the course. As Rhet/Comp studies departments split from traditional English/Literature departments, they take the cash-cow classes with them. On top of that, we are living in an academic and economic environment environment that favors what people perceive as job preparation and practical skills, meaning that higher-level university administrators may feel pressure to place more value (and invest funding) in writing and rhetoric classes more than in literature classes. We in the field appreciate the value of understanding literature, but those administrators may not. When the comp. department splits from the literature department, it becomes even more complex because this split can endanger the literature department's funding. Keep in mind this is only one facet of the tension, and it's overly simplified in many ways, but it does help begin to understand the politics that create the scaffolding for it.