From the article "teaching still only equates to 33% of my workload".

Teaching at universities is virtually never their sole function, and rarely the majority of their function. At UK universities most such staff take the job for research and have to teach as a condition of that job.

It's true that university staff vary in their commitment to teaching and I can remember many who felt that teaching was beneath them and a distraction from what they actually want to do. Unfortunately, this is the nature of academics, unless you have distinct research and teaching roles, this won't change (and that's another endless discussion).