"Game theory is not about winning games, but finding equilibria."
This. However, if you understand the equilibrium for some behaviour, you can understand what would it take to change the behaviour.
I use this in my startup where we create an equilibrium for dentists to provide reliable dental care. And, it actually works.
But caution: game theory is not about winning games, but finding equilibria. You might be more interested in behavioral game theory (how people learn the games, k-level thinking etc) if you want to get a leg up.