1) Sympathy cards should not have rhyming poems in them. Sure, it’s the thought that matters, the expression of condolences and comfort. But insipid june-moon-spoon doggerel isn’t the best way to do this. Hallmark didn’t know the person in question, so what it needs to do is say something nice and then get out of the way and let the sender talk.
2) When you’re ready to mail out a sympathy card, make sure you have some stamps that show something like flowers, doves, whatever. Anything other than R. Buckminster Fuller’s geodesic head.