From the perspective of the article, it seems that not having a target distinction between anxiety and anger would make the two feelings indistinguishable and thus the argument would fall apart. BUT, I do think there is a difference between the rage that comes from anger and the unease that comes from anxiety, and that may be triggered by the uncanny valley feelings from AI or the loss of job security from AI or the feelings of replacement that may come from AI or the environmental concerns that come from AI or the capitalistic underpinnings of the current implementation of AI, the list goes on. Some people may take anxiety from these things, and others may take anger. I don’t see one emotion as being less valid than the other.
Also, I don’t see any use in saying someone shouldn’t be angry or anxious in a particular situation. You can’t control your emotions like that. You can control how you _react_ to your emotions, but not the emotions themselves. I do think that emotional regulation is important in work (and also in life), but that doesn’t mean that you don’t feel what you feel.