Why do o need a apple id

• It is the only way to identify the device in case it is lost
• It is the only way to allow apps on the device
• It is the only way to send/receive messages using iMessage
• It is the only way to link your watch to an iPhone
• It is the only way to restore the watch from a backup

If you are looking for something to put on your wrist that only displays the time, then a smart watch is not for you. That also includes anything offered by Samsung that requires their own account.