NemosMum
Greetings cards have become fetishised! Once upon a time, cards were sent when you were not in a position to speak to the recipient in person or on the phone. Also, at 12, 13 and 16, kids still rely on parents for these things - oh, and they're boys. How many men are entirely independent in card/gift purchase? Not many! Don't read anything into it.
Exactly.
If you lived more than walking distance away and had no transport, or didn't have a telephone, or were otherwise unable to contact someone on their birthday, then cards were a way of reminding people that they were remembered.
Nowadays, with family WhatsApp groups, Skype, Zoom, FaceTime, text, or just phone calls, there is just no need, and until the blackmail of 'send one to X or s/he will be upset' stops, it will be difficult for people to exercise their right to Just Say No.