This question is for OTD people who have dropped rituals because they don't make sense, and also for non-OTD people who invest effort and energy into showing how much sense our rituals make.
Aren't you guys both sort of missing the point?
Our observance of secular rituals doesn't depend exclusively on whether or not they make sense. Why should our observance of religious rituals depend on that, and that alone? As the #1 comment said, it only has to make sense if we don't enjoy it, or it isn't causing some kind of tangible harm.