That’s the reason we have to still use fax machines right?
I know there are ways to do encryption like PGP on your message directly or I think email sent over TLS? But that isn’t the default right and that’s why I can’t send a picture of my license to the insurance company directly over email?
Phone systems are all digital these days. A phone tap is easier than ever, and in higher quality.
Also playing back the sound of a fax can reproduce a fax, with the right tools.