The word “feedback” might be overloaded here also — if you haven’t worked in a culture where feedback is an honest, no-blame part of the culture, then I can see how the idea of giving feedback can feel like a disingenuous corp-speak way to make a person fall in line or have their career impacted. There’s also an inherent power dynamic in giving feedback. However, if the work culture celebrates feedback as an honest way to have more direct conversations, and makes coworkers feel psychologically safe talking to one another directly in this way, it is something that makes culture better for everyone and gives better results in the end. I have given feedback to many people, and I have received it in turn many times.
Also, I am an IC, not a manager.