we're personally fond of can-of-worms as a metaphor, because it's so vivid. that's usually our go-to when talking about irreversible escapes, with toothpaste a distant second. we try to avoid the genie thing because of the slavery and racism angle.
with that said, when humans are actively choosing to do a thing, that is always a choice those humans could make differently. people have control over their own choices, you know?