you seem really down on women who haven't bought into the xmas martyr shit as being unsisterly, when I feel we are leading the change for our sisters by modelling the alternative.
There's nothing wrong with saying "I refuse to be a Christmas martyr" but loads wrong with "so if you struggle with Christmas it's therefore your fault, just RESIST".
You seem to be saying ‘until society says it’s fine for women to opt out, I won’t be doing that’ which is silly.
I see so many stressed friends and I can say "you don't HAVE to do that" all I want but they continue to be stressed, by society's expectations, their wider family's expectations and their DCs' expectations.
And some of them are building up their DCs' expectations that this is what women do - I think of one instamum who has two sons and a waste of space DP who has the BEST staged photos etc. etc., a high powered job, her boys are growing up to think Dad sulks and Mum organises everything and that's how it's perfect. And another I can think of with a lovely DH but she's the one who's stressing over the Elf/meals/how can I get it all done.
There is something in the "motherwork" thing but before I had DCs, I had a poorly MIL and it was expected that I'd contribute to her care (and to ideas for her gifts, taking her out for Christmas etc.) in ways that nobody would expect my DH to do for my DM.
DH doesn’t abandon me to it and see it as wifework. He just needs to do things more in the moment than weeks/months ahead. So it works well for us.
In other words, poor little man brain, I have to do the thinking for us.
I wonder about countries that are minority Christian. Are Christmas celebrations more simple with fewer expectations?
Very much so, but it's still women doing it!
I've lived in a majority Muslim area in an evenly split country, so Christmas was a public holiday (it is after all a prophet's birthday for Muslims). Christmas was a day to be at home with family (especially if tacked on to a long weekend, and everyone tended to take leave to be off over New Year as well), go to church, and have a special meal (cooked by the women of course). Maybe new clothes for the kids (bought/made by the women).
Eid was similar, new clothes, special meals, and a big evening out in some areas. Though taking the kids out was more of a dad thing to do (mums wouldn't be going out to a large evening public do on their own, and some won't want to travel to their home area either with just the kids, for safety reasons). But that is because it's not that easy for women to travel on their own (so some fear it, and some are not allowed by their families, but some do e.g. if they are independent/working). So women from more traditional families would be at home cooking anyway.
But some of that is due to a more traditional society anyway (and poorer so no money for toys).
I think you might need to look at e.g. Israel for a rich but non-Christian pattern.