Eg. Based on experience many people tend not to send Christmas cards. They can’t understand the purpose. That’s not inherently terrible. It’s just a different viewpoint. On the other hand there’s people that couldn’t understand not sending cards.
When people form a couple there’s many things like this where one part of the couple has the bar set in a completely different location. Which I think is ok. It’s ok for one half of the couple to not do as much card writing. The workload of a relationship should be split evenly overall but if one places waaaay more importance on a particular aspect than the other it’s ok for that one to bear more of the load in that case.