When i was doing recruitment training, the consultants (who were involved in redesigning in recruiting in many of the big places) specifically warned about the challenges of changing it.
Lots of people cant see past the way they were recruited / i had to do it, why shouldn't they type thing. They end up recruiting their mirror image and the pattern continues even if given evidence that their recruiting process isnt meeting their own aims and is screwing themselves over.
It creates a dangerous environment where there's little diversity of thought or skill set and similar to any species that lacks diversity it leaves huge vulnerabilities to outside changes. They miss good candidates because they dont recognise them, and keep getting the same people.
The aim shouldn't be to find someone who is good at interview, it should be to find someone who is good at the job and the role of the interview should be to assess that. Often now moving to things like questions in advance, things that people can prep eg presentations but more task based processes
Because after all what I'm looking for in a social media person, head of estates, spokesperson or data analyst is wildly different so they should be assessed on different criteria via different tasks.
OP might be interviewing for head of accounts in a small charity, head of safeguarding in a massive one, head nurse in a hospice etc
They might be interviewing for a role with a high level of scrutiny where facts are everything. These days even politicians, barristers and white house coms all carry notes on their podiums
Of course they might go in and read directly of cue cards and avoid all eye contact, never build a rapport
But they also might go on more confident, more factually sound, less thrown by curve ball questions and glance at their notes in a way that presents them with certainty. It doesnt mean they dont communicate clearly or flexibly at all. Having notes in front of you might mean you are able to give a good answer to a less prepped question that you didnt anticipate.