Companies are chock full of asymmetric negotiations. Aside from obvious things like discussions with your manager, companies have all sorts of structured and unstructured power asymmetries.
You also believe that the power dynamics of an interview are different than the power dynamics of a company, as in an interview making a mistake can mean the difference between being hired and not. I don't disagree with you here, as ultimately making a mistake in an asymmetric negotiation at a company won't always get you fired. In this case, what I was providing a response to my parent comment, that if asymmetric negotiations are a problem for a person then a company will never work for them. These two things are not exactly the same, though I wouldn't fault someone for taking difficulty handling one to imply difficulty handling the other.