Are you joking? Interviewing involves many skills. Technical interviewing moreso

Right. So why would we be forgiving of people being ignorant about it?

I mean, yes, it's certainly possible to be ignorant about it, lots of people are. But unless you somehow want to hire people who are completely uncorrelated with being good employees, the distinction between unwittingly and wittingly being a terrible interviewer seems a bit thin.

I never implied we should be tolerant of ignorance. "It isn't necessarily malice" is what I basically said. That's not the same as "It's ignorance and that's great."

And the distinction isn't thin. It's the difference between an easily solvable problem and a really hard to solve problem.