If you interview someone, and you determine they don’t fit your company culture, what does that mean?

Or

If you are the candidate, and the feedback is, you don’t fit the company culture, what does that mean to you?

Do we sometimes use “company culture” as a scapegoat reason to some other underlying problem?

Or is it just necessary to say this to prevent an uncomfortable and potentially hostile situation?

Maybe poor communication, being unprofessional, undesired appearance, inflated ego, negative attitude, or some other soft quality gets put into the company culture bucket.

As a recruiter, it’s hard to receive and even harder to give when it’s such a broad stroke.

In other words, this is not how it usually plays out when providing feedback after the 1st interview.

Recruiter: “Sorry Chris, they’re going to pass on you, as you didn’t fit their company culture”.

Chris: “Oh, OK, I know exactly what they meant”.

Can the company culture rationale get some supporting context when providing feedback or is it best to have to make assumptions on the underlying cause?