I've given coding interviews for 20 years, and I'd estimate 9/10 candidates have been competent whiteboard coders. I don't have any explanation for the extreme

I've given coding interviews for 20 years, and I'd estimate 9/10 candidates have been competent whiteboard coders. I don't have any explanation for the extreme discrepancy between my experience, and the "hardly anyone can fizzbuzz" folks. Of course this colors how I treat people. I'm much more inclined to interview seniors conversationally and judge competence by the way they talk about work they have done. I have a hard time imagining people investing the time to become conversationally fluent in a domain, as some kind of long con.