I taught at a Big 10 university for 12 years, both as a TA and as instructor of record.
So I think I actually understand the system pretty well.
Edit: teaching is part of the job, dude. It just is. If you asked the average taxpayer (you know, the ones who pay the base salary before grant money is taken into account) whether teaching is an important part of the job, what do you suppose they're going to say?
If you don't want to teach, you need to find a job that doesn't involve teaching. If you accept a job that requires teaching, you're morally obligated to provide the best teaching you can.
Or so I see it.