Non-baited statement (and I'm aware it's discussed a lot here), but my experience with people saying the candidate wouldn't be a good 'fit' was just a way to enforce bias either unconsciously or consciously.

And led to problems with group-think and an inability to think in different ways.

Now granted my hiring sample is less than 100, but that has been my experience so far.

As a serious question, why do you think that dissimilar groups product faster or higher quality work? How far can you take that concept? Should they even speak the same language?

It probably makes it easier to act like a professional. If you reduce the social gel at work, perhaps more work gets done. Maybe I've gained a morning of productivity today because a conversation didn't devolve into a Simpsons quote-athon.

why should the candidate just apply for software engineering jobs? Isn't focusing on one field just enforcing their bias to a particular industry? Shouldn't we enforce basic rules that candidates apply to a diverse gamut of other jobs, such as truck driving, painting, and customer service? And shouldn't we shame them if they decline an offer for a labor job by calling out their biases? Shouldn't we require candidates to apply to more than one company? I mean, if they focused on one company at a time, that clearly enforces their bias (either unconsciously or consiously). How are we going to contain this blatant bias in job applicants?

I can't tell if you're being serious or not. If you are, then you have missed the point entirely and I would argue don't even understand what I was talking about in the first place. If you're not, then you got one over on me 100%.