I exclusively call landlines from my phone, at least using "actual" phone calls; businesses, to be precise. For all person-to-person calls, my family and frien

I exclusively call landlines from my phone, at least using "actual" phone calls; businesses, to be precise. For all person-to-person calls, my family and friends have long switched to FaceTime and WhatsApp, which are both encrypted. Why would I pay per minute for a less secure and lower fidelity (HD voice usually does not work internationally) channel? That said, I really would prefer if the POTS were better secured, given that SSNs and payment card numbers are transmitted over it all the time.