Yes, they do, but the point of the OP is that this person is still suffering from heavy narcissism, as evidenced by their writing an article about their experience regarding Facebook.

It was an interesting article - a bit obvious, but still worth reading - and I thought that the OP's comment was spot-on.

Narcissism is healthy and good - it pushes people to achieve.

I agree. Narcissism is healthy. But when the point is the article is "how I became less narcissistic by not paying as detailed attention to Facebook," and it's an article that pays deep attention to his personal experience on Facebook, then an accusation of hypocrisy makes a wee bit of sense.

I think you're confusing ambition with narcissism.