This idea is to have the ability of having a repository of canned responses that can be used in workflows. Instead of typing the paragraph in the workflow, having just to select a canned response would be easier. Workflows are cluttered with the Message blocks.
The feature of referencing a canned responses in a workflow feels that it would be a cleaner approach, which also allows to easily reuse the canned response in multiple workflows.
When having different paths for outage, holidays, operating hours, out of hours, etc, referencing a canned response from a repository is cleaner that having different message blocks clutter the workflow.