Those are gorgeous pictures, Una, and none of those women look "older", at least to my eye. I'd love to think that we are coming to a time when shades of grey or white hair become just another hair color instead of seen as some sort of philosophical statement. If we continue to have fun with fashion as we age, why should hair be any different?
The biggest hurdle, at least for me, in letting my hair go grey was accepting that my appearance would change without my being able to control what, or how, it happened. My shiny, deep-brown hair had always been one of my best features. Going grey was disconcerting because my appearance was visibly changing--without my permission! The woman I saw in the mirror was just fine, but she wasn't me. Since I'd never colored my hair, I didn't have a shade to which I could revert to go back to a more familiar place. My choice was to either work with the change or start, at the age of 65, to figure out the world of hair dyes. The first option just seemed easier and less risky--hardly a political stance.
I personally think the biggest hurdle about going grey is when we realize we can't control how the process will unfold on our own heads. If I don't like the shade at a salon, I can go back and choose another color or technique. Going "natural" means I have to embrace instead of fight--sort of Kibbe for hair--and that isn't easy. I suspect that's why those of us who are letting nature do its thing get a bit psyched up about the process--it's more about keeping up our own confidence than anything else. Transitioning into an visibly older version of yourself isn't easy in a society that puts a premium on youth.