I'm not sure how the second sentence in the original quote negates the first. All it says to me is that your social status doesn't necessarily have a bearing on your charisma score.

In any case, you don't need to be likeable to have a high charisma. Most of the classes you use as examples, like the dread necro, binder, warlock, etc are disliked and mistrusted primarily because people fear them and their power. Being scary is based on charisma, and you can lead, persuade, and even attract people to you by being scary.