I was one of the first practitioners of social engineering as a hacking technique, and today it is my only tool of use, aside from a smartphone - in a purely white hat sort of way. But if you don't trust me, then ask any reasonably competent social engineer.

When a hacker gains access to any corporate data, the value of that data depends on which server, or sometimes a single person's computer, that the hacker gains access to.

Hackers rarely have full knowledge of the technology stack of a target.

John McAfee Quotes