Calling it "nonviolent communication" is a brilliant marketing move, as it implies that not conversing in this manner is violent. I've seen this style many times in my career, and it always comes off as patronizing. It also tends to be used far more often than recommended. Instead of being deployed in difficult conversations, it gets used in every one-on-one. My guess is that NVC ends up like power posing[1]: pop-psy…
This style of communication is not supposed to be a tool for more efficient (or deniable) emotional manipulation / control.
The “nonviolent communicator” is supposed to spend a lot of work up front thinking about what their real emotional needs are (which takes serious introspection, not just trivial rationalization), stripping judgment and generalization out of their observations, eliminating speculation about other people’s intent and state of mind, and coming up with requests instead of demands (in many cases those requests might be requests for additional data or possibilities), not backed by implicit threats if the request goes unmet. Ideally the non-violent communicator should be trying to drop their internal judgments and biases as well, not just leaving them unstated.
Someone who is adopting this kind of communication needs to be open to getting push-back on their comments and hearing that their demands are harming the emotional needs of the other person, open to considering alternative suggested remedies, etc.
The point is to accelerate mutual understanding of each-others’ feelings, promote empathy, and come up with some kind of outcome which is acceptable to both parties.