Comment by zahlman

> And you definitely don't care how a payments network point of sale terminal and your bank talk to each other... Good software is invisible.

> ...

> Are you keeping up with security updates? Will you leak all my data? Do I trust you? Can I rely on you?

IMO, if the answers to those questions matter to you, then you damn well should care how it works. Because even if you aren't sufficiently technically minded to audit the system, having someone be able to describe it to you coherently is an important starting point in building that trust and having reason to believe that security and privacy will work as advertised.