In a private context yes, but in a public context where there are outside influences and attacks, it can be useful to have group norms that are explicit. It ten

In a private context yes, but in a public context where there are outside influences and attacks, it can be useful to have group norms that are explicit. It tends to attract people who believe implicitly in the norms. It is a way of signaling overtly what sort of culture the original maintainers possess.