Hey mate, loved this entry into the question...
I never thought of the term 'light-worker' before... and yes, I think I agree with your take on that. There is the implication that it's 'work', and I'd say that most of the people we describe wouldn't even consider it 'work' by any standards.
Light-warrior seems a bit martial for my tastes, although I completely get it, and is a good reference.
I wonder if the term 'creator/creatrix' wouldn't simply describe these kinds of people....?
Light warrior is pretty well established in my conscious circles, and I see where you are coming from, but the warrior word is necessary since we are in fact fighting a war here... I just chose to acknowledge that, some do not want to believe it.