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Is "Luck" an advantage that NPCs can have? How does this play out for game downtime?

Can the bad guy use his luck when, say, gadgeteering a doomsday device to use against the city? With Luck he can avoid the small chance of a critical failure.

Or say, a powerful enchanter NPC. Can he use his Luck to avoid critical failures when enchanting?

For worldbuilding purposes, would high level NPCs with Luck be crazy powerful?

A super diplomat would never, ever make a critical failure. His nation often get enormous advantages beyond what his nation would normally get. (opposing diplomats will crit-fail and he never will. This adds up).

A general would never, ever, make a tactical mistake.

A gadgeteer would never, ever, blow himself up on accident.

An enchanter with Luck would be, well, truly awesome.

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