As long as some don’t want to see nudity in public, most, out of consideration, will also avoid it. Even if nudity was universally accepted, people would wear something to carry their phones, money, and keys. They’d want to advertise their social status. And clothes provide protection. Would you want to sit in a recently vacated seat on the subway if the last person was naked? Or imagine parking your nude bottom on a bench that’s been in the sun for a while.