In chapter 1, Introduction to X++, under Jobs you can find the following statement:
"... Jobs are used primarily for testing code during development and running batch processes within Microsoft Dynamics AX that affect large amounts of data".
Jobs are not in any way related to the batch capabilities of AX, and due to that fact that they are executed on the client, you'd never use a job to work with large amount of data.
I think the author somehow confuses the RunBase(Batch) framework with the Jobs node in the AOT.
You can find the same error in the course material for AX 2009.