I can't believe that the website that is being used for managing my Orbi system is only http.
Passwords to enter your settings are sent without encryption.
Try connecting to https://orbilogin.net
The connection will be encrypted as you want. Please be aware, however, that the browser will complain about the SSL certificate being "self signed" and will require you to say, "go ahead anyway" (the first time). Totally encrypted. Nothing "in the clear".
I agree with earlier comments that on the "LAN side" lack of encryption is more of an intellectual exercise than a real issue:
When a computer is connected to the Orbi router over ethernet, there is no way anyone can intercept data packets.
When a computer is connected to the Orbi router over WiFi, the transmission is encrypted. There are hacks to break WiFi encryption which require collecting hours of data, so a determined, sophisticated hacker can probably hack the WiFi system and collect anything that goes over the net. So, if a person is potentially a target of law enforcement or industrial spying, using WiFi is probablly not a good idea.
