There's not much nuance to "iPad doesn't run on iOS, it runs on iPadOS". You need an iOS device to setup an iWatch. The nuance only applies to how that came to

There's not much nuance to "iPad doesn't run on iOS, it runs on iPadOS". You need an iOS device to setup an iWatch. The nuance only applies to how that came to be, historically and strategically. The above doesn't constitute support for Apple's policies.