While i do agree with most of what you said, the term "lightworkers, starchildren etc." was derived just recently in the 20th century through "New Age religion" -
http://en.wikipedia.org/wiki/New_Age <--Link.
While i can understand and empathize with the human condition, yes, we all want to feel like we belong, that we have a purpose for being here. Yet, just as, we create our own purpose and meaning... it's just that you have fallen into the new age movement, which in not a bad thing at all.
Here's a link that provides a lot of information about "lightworkers" -
http://www.spiritualitysolutions.com/lightworkers <--Link
Whatever we do, or whatever we believe, or think... we give our life a purpose and/or meaning. A lot of us in this world want to devote our lives to making the world a better place, not just for the human animal, but for all life in general. A lot have many of the feelings described in the link above. But alas, if you are anywhere close to being a good natured, good hearted individual that cares more about the well being of others than yourself, it will be easy to find that everything it describes, sound JUST LIKE ME! Hehehe.
For all we know, this could be nothing more than a dream, this idea doesn't hold any less, or any more credibility than the beliefs of anyone in the world from which no evidence can be provided to support the claim.
I agree, we should all be empathetic, compassionate, caring... but i understand that some people can't, or won't attempt to give their lives their own meaning... so instead they replace this with a "divine purpose" to make them feel more special than we really are...because as far as we feeble humans can tell, we are merely a complex arrangement of atoms... a tiny clump of impure carbon and water impotently crawling on a small and unimportant planet.
I can see why thinking of yourself as a divine bringer of light, would be more fun to think than some unimportant human animal trying his best to make the world a better place.