There's unconscious bias, which is real (that really is a job of the human brain, actually), and then there's unconscious bias testing and training. Like I mentioned elsewhere, I've got ~ 9 minutes until an interview I'll have to attend for multiple hours so I can't adequately respond, but my perspective on unconscious bias is one of skepticism that said bias can be reliably tested for and whether the training is free of negative side effects.

What would it even mean for a human to be completely unbiased? We're big bags of heuristics with a thin skin of pseudo-rationality on top. We can remind ourselves to check our reasoning and maybe we'll make a habit of it but we can't unpick a lifetime of happenstance learning mixed with eons of evolved neural circuitry. We'd be better off just reminding everyone to try to be kind, have empathy and make a point of using good manners.