If it is a tail event, and the world has just been unlucky enough to have 11 / 14  BIS central bankers' speeches  experienced a realisation of that tail event, then there would not obviously be a need to raise the inflation target.
We also need to question whether the real interest rate structure has shifted lower permanently, because of permanently lower trend growth say, which would also shift down the nominal rate structure and increase the likelihood of hitting the zero lower bound.