If you agree that AI can reach human levels of accuracy is your point that we shouldn't ever try to assess someone's emotion in decision making, whether it's a person or machine deciding?
isn't that a pretty sane and basic assumption ?
Seriously though, especially with individuals, why shouldn't you use all the information available, if it produces results even an iota better than blind acceptance (and for most people, their empathic-sense does)?
In the context of real life, where we know people, are interacting with them, and are reading cues from their whole body and their movement over time, then we're much better at assessing emotions and we'd be pretty foolish to ignore emotional signals.