IMO, Purves is being more than a bit black-and-white about this. There is a continuum here, with meaningless cheap chocolate gorging at one end, and full-on chocolate-free piety at the other ? with tangents off it besides. The piety end isn't the (only) worthy place to be.
The atheists among us, of which I am one, probably have a different take on it altogether. As a family, we adopt (in our own way) several festivals (some religious, some not) throughout the year, and have many rituals of our own ? from sowing vegetable seeds and giving bunches of our daffodils to friends in the Spring, to picking our plums in August for jam-making, and harvesting our pumpkins in the Autumn. These rituals:
Bring family and friends together
Teach DS social skills with people of all ages, and manners
Teach DS about food, where it comes from, how to cook it, the growing season, organic gardening, sustainability, etc
Bring a lot of fun and pleasure into our lives and the lives of people we care about
Teach DS about the seasons and passage of time (gardening), history (Guy Fawkes), celebrated mystical characters from the past (Jesus), stories and other people's beliefs and giving and gratitude (Christmas)
DS's grandma buys him a bog standard Cadbury's chocolate advent calendar every year. It's a tiny part of this bigger picture, and good fun at that ? as motherinferior says. And it's helping get DS through the last few tired, Christmas-play-obsessed weeks at school. A child having a chocolate advent calendar is less of an issue than the wider backdrop of that child's life, IMHO. There is a kernel of truth in what Purves writes ? but I expect that the percentage of Veruca Salts among children who have a chocolate advent calendar, is nowhere near as high as she implies.