But queen Vashti refused to do as the king commanded.
The queens disobedience is one of consequence that would bring about Esther's (as queen) faithful risk taking to approach this same King, without invitation, to save her people.
The king responds to this disobedience by dismissing Vashti as queen (saving face for himself & his officials). This was the advice given him. This advice pleased the king. But what we shall learn from this book is that not all that pleases the king (& Haman) is wise or good.
One thing that stands out is that God will work through inept leadership of kings & officials to present an opportunity for God to act in saving ways thru the choosing of an unlikely queen.
Lord, for ways we might miss you at work,, open our eyes.