How exactly does one manage in a major company to set up an app in production that spits passwords, or even less sensitive customer data, to a logfile? Is that

How exactly does one manage in a major company to set up an app in production that spits passwords, or even less sensitive customer data, to a logfile? Is that the state of infrastructure engineering? The cynic in me wonders if it's related to the trend to take developers with some systems knowledge and turn them into Ops/SA's.