Yeah this, I am a bit younger - early 50s - and I have natural light brown hair. Was very blonde til about 13-14 y.o. but then went light brown. I have been dying it blonde since I was 16, and have ZERO intention of 'embracing the grey.'
Also, like you, (as I have said before,) I only have a few greys coming through at the temples, and sort of by the ears (where the hair joins on at the side of your face.) I would say about 10-15% of my hair is grey, if that. It's a bit different if you're already 100% grey. Constantly dying it would be a pain in the arse. The white roots would show through in about a week. I don't have to re-blonde mine for 2 months. Can get away with 3.
I have seen (as I said before,) some younger women with steel grey/light grey hair, and although I don't much care for it, each to their own. Is that what the younger women (under 45) are here are doing who are posting pics of themselves? The grey just looks too smooth and too perfect. Anyone I have ever seen 'going grey' has different shades, and some of their original colour showing. People don't generally just 'go white' at 35-40. I think there may be some cheeky boxes of hair dye at play here. And not just with the younger ones... 
I have seen women - usually a little bit younger than me, my age, and older - whose hair is greying, and you can tell it's going naturally. Too many of these greys on the photos that some posters are submitting look too smooth, and like it isn't 100% their natural grey. Some of it yes, but not all. (JMO.)
I also never seen women under 45 with totally grey hair, not natural grey anyway, just that silver colour that some younger women put on. I am not a fan of it, but it's up to them what they do.
As I said, some of us are fortunate to only be 10-15% grey, so I can't exactly embrace the grey. It would look shit (IMO) with streaks growing out of a light brown,
Much easier to embrace it when it's all grey. when you have no choice.
Finally, as I said before, I am struggling to fathom why random people are running up to all these white/grey haired women and gushing over their grey/white hair colour. I have literally never known of, or seen that happen. As a pp said, if it's someone you know, maybe they feel awkward, if they used to see you with brown hair and you suddenly got a shock of white hair, and they don't know how to react. Most people are polite, and aren't going to say 'fuck me Julie, I don't like your hair!' are they?! I also never see women under 45 in real life with grey hair. Funny that. And yeah I DO get out plenty thank you. 😆