Writers are able to make their own greeting cards, and I think it’s more personal when they do.
My vet did an excellent job doing surgery on my old cat. I have made a card for him and as soon as I can add a picture of the cat, it will be in the mail to him.
People tell me they enjoy my home-made cards. I enjoy making them.
I think people who are not writers could make their own cards as well. It’s especially easy on a computer. Just write from the heart.