I agree one can care without getting "cripplingly anxious". But you're ignoring how being anxious can definitely make you conscientious, something very helpful

I agree one can care without getting "cripplingly anxious". But you're ignoring how being anxious can definitely make you conscientious, something very helpful in work where fussbudgetry is half the job. If you have evidence that software developers and sysadmins are no more anxious that the average person, I'd be interested to see it. But my experience is definitely different.