Automations have to be reliable.
When an automation is working correctly, you don't have to think about it.
Out of sight, out of mind.
The more that it works, the more you take it for granted, the more it fades from your awareness.
This frees up more of your mental effort to focus on novel, useful things.
This is good!
But it also means you're getting set up for a rude awakening.
If the automation fails, the problem crashes back into your awareness and demands all of your attention.
It's an emergency, and you don't have the context of how the automation works loaded up in your brain.
A stressful situation!