Genuinely puzzled ... I work in an office with about 12 people. Over the last few days I have received 6 cards from colleagues that I talk to all the time. Why?
Similarly ... I saw a friend last night. As we parted we both wished each other a happy Christmas ... she then dug into her bag and presented me with a Christmas card.
I get that folks like receiving cards so that they know that others are thinking of you. But surely better to pass best wishes on in person ?