I think it only becomes wifework when you are doing it all by yourself.
I've always loved Christmas, I'm a big kid at heart.
Shared between both of you it becomes fun, and not work at all.
I'm not sure I entirely agree with this. Anything will seem like hard work if you don't like doing it or fun if you do. If you as a couple both dislike Christmas and are only doing it for the kids even if it is split 50/50 you'll still find your half tedious.
We have a basic rule in our relationship.
There are things that need doing. If we both hate doing them we split them 50/50. Cleaning falls into this category. If we both like doing them we split them 50/50. Childcare fell into this category. If one of us likes doing them and the other doesn't the one who likes doing them does the bulk. Cooking falls into this category, I love to cook, he hates it so I do the bulk.
Then there are things that don't need doing. If we both hate them nobody does them. Ironing falls into this category. Nobody irons. If we both like doing them we split them 50/50. Pumpkin carving falls into this category. I did it last year, he's doing this year's. If one of us likes doing them and the other doesn't the one who likes doing them does them. Anything beyond token effort Christmas falls into this category. I enjoy it so I do it, the only thing I really want from him is for him to drive so I can drink, which he does.
I'm really reluctant to tell other people they are doing their relationship wrong if one or other of them is doing the bulk of something. If you are unhappy with the split of tasks you need to discuss it with your partner but I'm not going to barge onto the Christmas boards and start assuming other women who may very well be happy as Larry going overboard on Christmas are wrong. If they aren't happy they can speak for themselves.