Forgot to follow up with results of my testing (Thank you for the reminder @SlabSlayer!):
This wishlist topic is a valid request. Attempts to setup Cam v3 Pro fail on open networks. App goes through the motions of attempting to set up, reads the QR code, setup fails and cam announces, “Cannot connect to local network.” Screen times out and asks you to reenter password even though you never entered one. Looks like Wyze forgot that they implemented Allow Unsecure (no password) WiFi Networks while developing v3 Pro.