Perhaps the fact that at the moment you do not need any for of sign in when you are a participant. Click on the link and it just works.
Zoom my have its issues but other solutions use similar technologies. The only reason Zoom is the focus of attention is because if the huge increase in use.
As far as the encryption goes, anything that needs to have a traditional phone number dial-in has to be decrypted servers side otherwise you will just send a stream of incomprehensible garbage to those users.
Biting the hand that feeds IT
