Monetary dominance implies that in carrying out its mandate a central bank may not make itself dependent on the specific decisions of other institutions. A fundamental assumption underlying European monetary union is therefore that different institutions must act independently within their mandates.
Several times in the past, the ECB faced the risk of inflation remaining high for too long in an environment of expansionary economic policies. Did we wait for other authorities to take measures before raising interest rates? No, and rightly so. Similar considerations apply to the current environment.