But jokes aside its mostly about realising that when you consider all aspects of computing its such a wide, deep field that no one, no matter how much of a "power user" they think they are, will ever do things perfectly, and mistakes add up over time until one day Validimir Hackowski is running bitcoin miners in your AWS account. Then you find one aspect or more of computing and investigate the infosec fields that help find those bugs/mistakes and fix them. I like websec and linux/windows config security, myself, all of which is in high demand.