[lmilcin]

Another important is that automation can solve the problem of passing the knowledge (on how to do something).

This happens when the person that uses the automation no longer needs to learn how to do the task.

Teaching people is actually extremely expensive even if you forget about reliability of entire process.

People have limited ability to learn stuff. So being able to automate certain tasks not only allows people to do more in less time or do it better, it can actually allow doing more things that the person would ever be able to learn, without need of learning.

[solarmist]

Not only that, but they can use the automation (assuming it was written for others to read) to teach themselves if needed/desired.