An interesting post addressed to agnostics, atheists and non-believers from someone who does not state their own religious beliefs.
The first paragraph reads a bit spikey with words like "something" and "reluctantly".
Of course some ignore the religious connotations and send cards conveying "best wishes" but that is just using a traditional time to express goodwill to fellow-manind. That includes an atheist (non-believer) like me along with my agnostic (dunno what to believe) female partner.
I certainly respect those who ignore the christmas holiday season without sending cards or presents. Quite the opposite, if I were a christian, I would be the first to reject the modern christmas because of its commercialisation, boozing and obesity.
Yule celebrations involving parties and a "feast"? it sounds pretty selfish to me.
Apart from buying presents and sending cards, just as what I now regard as regular moral duty, I have spent a lot of the previous days giving to food-banks and providing clothing to the needy. This even tho' we have only modest income.
As for effects on children, I suppose it depends on how much they understand of their single-parent's or their parents' circumstances and beliefs. I doubt if it effects their lives fundementally, one way or the other.
SIQ.