It's not the extras to make it special that make it special that is the stressful part, its the bloody basics!
School/nursery stuff - nativity, school disco, whatever else
Work nights out/secret Santas etc
Arranging to see all the family necessary in a way that makes everyone happy
Presents, for kids, partners, family, teachers, those who buy for you etc
Food. So much food.
Decorations, tree etc
Santas grotto visit
I'd say that was a fairly basic list for most families. There's no handmade this or that, no elves, no special keeping up with the Joneses. Just normal Christmas with a family, and it involves loads of thought and preparation and time and effort. You can't really opt out of most of that without it being a bit shit for the kids especially.
I like it all, I love this time of year but parts of it are very stressful and cumulatively it is a lot when you have a normal family life and job etc to be dealing with.
Its pretty annoying for people to say I'm somehow bringing that on myself, choosing to be OTT or whatever.