I don't feel like I've ever had a game that was hands off enough that I could just watch it without doing something. Maybe if pawns were smart enough to defend raids without micromanagement I could?
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Playing peaceful mode has its charms
Maybe for long periods with a mostly established base and in-between raids? with the default auto-pause for bad events.
In more peaceful/autonomous life sims, hands-off games is a thing (in Creatures they call those Wolfling runs). But yeah, in my Rimworld games, I don't see it lasting very long before I need to decide something.