Well yes, we should be having a quiet few weeks before seeing family at Christmas, except all the shops were shut in November, so people who would normally do their Christmas shopping then are having to do it now.
The government can't on one hand say they want people to spend the same amount, but then limit the time frame you can do that in, and be surprised that lots of people are all hitting the shops the weekend after they reopen - particularly if this year families are going to be posting more gifts than normal so want to get them bought this weekend and posted next week.
This is rather like back in March - government telling people that if one of their household had symptoms, the whole household would have to lock down for 14 days, then being surprised that most families interpreted that as meaning they had to stock up enough food and toiletries so they were constantly ready for a 14 day lock down, when normally most families shop 2-3 times a week for food and household items, and that might cause shortages.
Its like none of them ever have to do the logistics for family life and are constantly surprised at normal reactions to their rules.