[un3n]

I think you're missing the real world nuance here, anxiety isn't as on/off as you make it out to be. For me, a developer with social anxiety, there is a huge difference between an interview environment and talking out a problem or code review with a team I'm familiar with. The two main factors for me are one my anxiety just skyrockets around new people but quickly calms down after being around someone for a couple days/weeks and getting used to them. The second is one aspect of my anxiety be is an abundance of worrying about people judging me/what I'm doing/wearing/whatever and in an interview the interviewer is doing just that: judging my performance & worthiness to join their team.

Anyways that was a long winded way to say it is entirely possible for someone to be anxious and generally bad at interviewing while also being capable of being a productive team member.