I think most parents, (why just blame mothers?) give their children lots of time and do all sorts of things with them in the run up to Christmas as at other times, but what gets done varies from family to family and generation to generation.
Just because nowadays parents find it easier to buy a costume for a play or fancy dress does not mean that parents do less with their children or buy their way out of parenting.
I am heading off to see DGC this weekend and, once I reach them, it will be Christmas, Christmas, Christmas all the way; making decorations, Christmas cards, special food and talking about everything they will do with us when they come and stay with us for the Christmas week.
Their house will be full of Christmas with parents deeply involved that any costumes needed, may be bought, is no reflection at all on the quality and commitment of their parents