Uh-oh, now you've done it. You've forced me to use Si!!
I had to fight all my life for the right to exist as the person I am, against social forces that wanted to obliterate me. Therefore, I cannot bear to think of things being obliterated. I've always had flaws, but so has everyone - I had good points too, and I had to fight for the right and the opportunity to prove and show those good points to the world, and to contribute positively to society as myself.
This experience has given me a fairly special view of traditions and customs. Sometimes, though they make no sense to me, so long as they don't actually hurt anyone, I'll respect them and even observe them, simply to save them from obliteration. Sometimes, things get lost in the mists of time, meanings of things get lost but their external manifestations remain in these traditions. If those traditions are kept and observed even through the time when they don't make sense, it could be that a discovery will be made, perhaps some archaeologist will dig something up that will shed new light on those traditions and make them mean something again, and the full richness of their meaning and use can be enjoyed once again by a new generation of people.
But if everyone had stopped observing them when they no longer made sense, they would've been obliterated and when the archaeologist dug the thing up, they'd have just had some piece of text or a picture or a pot or something that they wouldn't be able to know the full significance of, not being able to put it together with the 'actions'.
Imagine if the actions of the Hokey Cokey became lost due to songs with actions going out of fashion for a few generations. You'd just be left with a lame song that was no fun. But if everyone still kept passing it down to their kids, at some point someone might find a book that had all the actions described in it, people would rediscover them and all the fun you can have 'performing' the song with a group. The whole thing would come together again.
Imagine now that it wasn't the Hokey Cokey, but something more philosophical, something really deep and mystical.
But even without the true origin or meaning being known, participating in customs, rituals or traditions that you know go back a long way in your community can help people feel connected to their ancestors, give a sense of continuity and meaning in that way. So they're still not useless.
To tie it all in with my experience, I guess I'm saying that if something has encoded in it some property or function that can be beneficial or enjoyable or meaningful, I think it should be allowed to continue to exist even if at the present time, most people are unable to see its true worth.
Phew... that's enough for me. I mean I know I've worked on my Si a lot but even so, that'll do!