Very few people frown on operations to lessen jug ears. They are considered beneficial, because kids will be more "beautiful" and will not be ridiculed for them. Being uncircumcised in a group that considers circumcised penises the norm or beauty standard would lead the kid to being shamed in the same way. Hence, circumcision should be accepted.
As long as it is not objectively causing long term harm to its members, every culture has the right to perpetuate its view of the world and "form" its members, in mind and body, to serve and support the overall goals of that culture. It is - in essence - the entire gestalt of the concept of culture.