Earlier quoted context omitted.
For sure. And I also am not sure I want to work at a place where being really good at interview skills is what gets people jobs. The correlation between "interviews well" and "collaborative, productive coworker" isn't very strong.
How are you determining your lack of correlation ? Is there data on this somewhere? Because I would assume that people who study and prepare for the interview are more likely to be studious and prepared in other aspects of life, including their workplace.
I have also worked with a number of people who are quite bad at interviewing but were excellent colleagues: highly collaborative and technically excellent.
When I create hiring processes, it's the latter people I try to select for. So assorted coworkers aside, the data I have come from those hiring processes. The glibbest and most charming people often do poorly in the pair programming portion; the most awkward often settle down into doing excellent work once you get them in a familiar context.
Some people are great at both, of course, and some people are bad at both. Which should be unsurprising given the number of people recommending a focus on developing interview skills. The whole idea requires that job skill and interview skill are not well correlated.