The Ability to do Otherwise is a Law of our Nature
The Laws of Nature are a description of how the many objects and forces that make up the physical universe work. One type of such objects is the intelligent living organism.
Intelligent living organisms include all the autonomic and instinctual behaviors of their biology plus the added flexibility of having an intelligent brain capable of imagining alternate possibilities, evaluating their options in terms of their own goals and reasons, and choosing which option they will physically implement by their own actions.
This the ability to do otherwise provides a survival advantage to all intelligent species, allowing them to come up with new ways to adapt to a wide variety of environments in which they find themselves. It gives them a survival advantage over species that are limited to hardwired instinctive responses.