I am one of those weird people who genuinely like sitting down and writing a big heap of cards and thinking about all those people, popping in a little letter to the relatives abroad that I have not seen for a while, selecting and pasting in photos of the girls etc etc.
I love recieving them, reading what other people have been up to and like to see them hanging up.
You could say I am a bit sentimental and nuts wanting to keep track of everyone and keep in touch, even if only once a year. Who is to say you are right or I am? It is up to you what you do. If you do it though, only do it because you want to, not because you have to or total waste of time, card and money.