The key takeaway seems to be while Yang says automation has displaced jobs there's a lack of academic consensus on the weight placed between trade policy and technology improvements; but everyone agrees both have had a significant effect.
Ok... so we shouldn't be coming up with a plan for how to address economic changes due to technology based on "it's historic effect has possibly been outweighed by other factors" even though we all agree it will continue to have an effect in the future?
Also just want to point out that anyone using the reported federal unemployment rate as a measure of overall employment health has already lost all credibility to write on the topic.