Earlier quoted context omitted.
How should you conduct the interview, then, if: ... Classic interviewing techniques of "explain how X algo works" or "write code to solve Y" will unfairly bias against interviewees that don't test well under pressure, but would otherwise be a good coworker. ... "Teach me something interesting to you" or "tell me stories about past experiences" will unfairly bias against interviewees that are shy, soft spoken, or are…
I don't see what useful signals are supposed to come out of an interview. If referrals and recruiters aren't an option I'd probably try to skip the interview altogether and go with a long probation period (3-6 months). Or possibly have a short 20 minute free-form interview talking about their last day job and expectations of the new one with a very short list of major red flags ("doesn't want the job", "unable to for…
It takes time, money and people to bring someone in, and hiring is actually quite a risk for many companies (unless they're huge and/or in a hiring frenzy).
If a candidate doesn't work out, that's a lot of time and money down the drain, and potentially lost work, and disruption to teams and timelines, etc..
Most people don't get this part, and I think that's why they don't understand why interview processes are structured the way they are.
You really want to do the best possible evaluation, on all fronts, at the start. The longer a bad candidate stays in your pipeline or company, the more expensive and disruptive it gets.