You are driving a car with rear-wheel steering and no reverse gear. You are driving alongside a wall. If you drive too close to the wall you are trapped, because you would need to steer your rear wheels into the wall in order to get your front wheels to move away from the wall. If your car had front-wheel steering you couldn't get trapped like that.
Using an interest rate instrument to control monetary policy is like having rear-wheel steering to control your car. If you get too close to the Zero Lower Bound wall, you are trapped. Raising the inflation target to reduce the chances of hitting the ZLB is like choosing a route further away from the wall to reduce your chances of getting trapped. It would be much more sensible to choose a different car, with front-wheel steering.