If I'm understanding what you're saying, it makes sense - if a behavior is driven by a genetic predisposition it can still be changed through training/conditioning, but the outcome may never be perfect or reliable. At that point it becomes more about management. In your shoes I would be working on things like a rock solid recall - ideally, so strong that she can be called off another dog she's pursuing - and "look at me" (as a command to pay attention to you, rather than an approaching dog). I'd also consider getting a leash or harness that clearly warn other dog owners off approaching her.