I listened to the entire episode and I thought the general idea was that cloud makes a lot of things easier and safer.  I didn't get any vibe of a single system being impossible to secure.  I agree that a single machine is the solution for most users (like myself) with a single site, but I don't think you got the point of the show.  They overall theme, as I heard it, was to think of the good but also the bad of going to a cloud option.