I always wonder when people tell these stories exactly what the metric is.

I've been around the block for over 3 decades. I've had a number of high level positions across both IC and management tracks. These days I'm very hands on keyboard across a number of clients. If you asked me to write a basic for loop or if statement, there's a small chance I'd flub the exact syntax if writing on a whiteboard. Both because I bounce between languages all day and wires get crossed on the fly, but also the standard interview pressure type arguments. Whereas if the test is "does this person understand what a for loop is and how it works?", then yes, I can easily demonstrate I do.

In real life I'm not going to take an interview where there's not already that degree of trust so if that questions comes up something is already wrong. But I'm sure there are interviewers in the world who'd fail someone for that.