It's terrible, really. Sociologists prone to using jargon would say this was more than microaggression; it is a shaming exercise that may have been traumatic, too. It's equally terrible that people conflate education with discipline, forgetting that nursing is not like doing arithmetic on paper, where you can erase or overwrite or whatever. This is not to say that we have to excuse mistakes, just to acknowledge that mistakes happen despite best efforts to avoid them. No good nurse wants to do a bad job. Workplace equality is an important ideal. How can people, especially ones in the nursing industry, not realize that a safe environment is essential to function well? I think all mid-level staff in almost all industries should be routinely sensitized. Sure, some people at the level come with some background in Organizational or Industrial Psych, but they also need to be introduced to more specific aspects such as personality and its relation to interpersonal harmony and conflicts at the workplace (one useful text I can think of is Theories of Personality (see: https://www.bartleby.com/textbooks/theories-of-personality-mindtap-course-list-11th-edition/9781305652958/solutions)). Some argue that this places unnecessary importance of political correctness at the cost of really, effectively getting a point across, but examples such as this one show that it's important to encourage those who give feedback to regulate their thoughts and words.