Exactly. They're usually written by people who have encountered someone with BPD in their life but who have not made any attempt to understand the condition other than in how it negatively affects them.

People with BPD have heightened emotional empathy but sometimes lack cognitive empathy. This is why we often fall into the trap of being manipulated by others with less than decent intentions towards us or find ourselves behaving in ways which are primarily driven by emotion.

The big difference between a narcissist and someone with BPD is that when a narc is manipulating it's well thought through and they hide their tracks so you often wouldn't know or they'd put all the blame on you. The irony is that people with BPD who lack the ability to mask their emotions may appear as if they are manipulating others when they aren't. We usually just don't want people to hurt us emotionally which considering how extremely painful that feels for us is perfectly f-ing understandable.