You miss the point, it is not about communication as in having a conversation. HAM radio is about testing technical skills of setting it up and being able to test those technical skills to set up communication channel.
If you want to have encryption go to enterprise solutions and restricted bandwidths. Encryption will make asshole companies to use bandwidth for their use without paying and will make all spectrum suck.
That is why you have call signs and all communications open for everyone to listen to because it is for public experimentation not for some private chats or data exchange.