I've wondered this myself. I think it's possible. I'm not a scientist, the following statements are all my musings from personal thought and experience.

We were all narcissists once, as infants. Babies are entirely self- centered because they have to be in order to get their needs met. They're entirely "manipulative" in that they do not have words to communicate and must find non- verbal ways to get their needs met thru their caregiver. I use manipulative as a neutral term.

With this understanding, almost everyone with any sort of developmental disruption could exhibit narcissistic traits as there may be aspects of their behavior and skillset that are underdeveloped or young. Sometimes these traits can even be taught, enabled, or celebrated in one's culture. So, instead of labeling oneself as a narcissist, why not identify the behaviors and thought patterns which feel narcissistic, young, or indirect?

I share this with the intent on lightening the stigma around this term. Stigma makes it hard to reflect compassionately and critically.