Problem is that Academia thinks that professors must be good at teaching and research. It's akin to wanting your Librarians to be good at Calculus and Library maintenance.

Research and teaching are separate skills, one doesn't imply the other. Research requires great amount of intelligence and imagination and dedication, while teaching is best suited for those that have great speaking abilities, great charism and slightly lower intelligence (it's easier for people of same IQ to relate). Asking to researcher to teach will detract from researching and vice versa.

One solution is to have cooldown period of research to focus on teaching. But I think R&D should be kept separate from teaching, but in the same way teaching shouldn't be bogged down by standardization.