Sorry, cant totally agree with that. Literature degree is ok if you want to just teach literature. That's fine. If you want to teach at university level you need comprehensive knowledge. That only comes with experience. A teaching degree or degree in linguistics would be useful. I'm not saying that literature is crap, I even think some Victorian era English lit is beautiful.

Can't teach it every class at Asian universities however.

Yes, I'm sorry to tell you, Turnoi does have a point.