Managing templates in a non-trivial environment can become it's own demanding task, if taken seriously. The templates have to be updated constantly to reflect new security updates or operating system point releases. And with every updated template, said templates have to be distributed to all Hardware Nodes where they are used.

Experience has shown, that quality is one of the first things being cut in operations/production environments when being time constrained, so preventing one source of constant work improves quality and security instantlyand irrevocably.