I agree with that but... There appears to be something different about it. It's different from the cleaning up of graves kind of respectful tradition. Not doing something or doing something not approved in a temple is seen as transgressive.

I know people who ordinarily one would consider agnostic, perhaps atheist, but have a kind of ingrained respect for various gods of different things.

Maybe there is something akin to the Easter bunny. Parents and kids know it does not exist, but they both keep up pretention in order to have a fun event (for both parents and children). But in this case it's individual/society.