The way in which we achieve the goal can be adjusted, depending on the circumstances. This flexibility is important to be able to stabilize other aspects of the economy that also matter, but for which the desirable level can change over time or depending on the circumstances.
Without these general inflationary pressures, it is unlikely that the oil producers would have been able to make the large increases in oil prices "stick" for any length of time. Besides helping to make the oil price increases possible, the legacy of poor monetary policies also exacerbated the effects of the oil price increases on output and employment.