Is balancing jobs the same as job rotation?

No, The idea is not that everyone perform every task, or that all jobs are rotated. A balanced job will still only involve a small number of tasks. For example, there will be workers that still specialise in surgery, architecture, engineering and so on. However, if the specialised tasks are more empowering than tasks are on average, those who perform them will also perform some less empowering tasks as well. The balancing of jobs is a flexible process and could be conducted over months and not over every hour or day.