Executive teams are assembled from the most capable people in an organization, which is precisely why their failures are so often misdiagnosed. When delivery slips, the instinct is to look at capability, incentives or structure. The cause is usually somewhere less comfortable.
It may be that agreement in the room was never real, and that silence was read as consent. It may be that accountability for delivery was left collective, which means it was left unowned. It may be that the team has learned, over time, to avoid the two or three subjects on which its members genuinely disagree, and that the strategy depends on precisely those subjects.
Alignment is not the absence of disagreement. It is the presence of a shared understanding of priorities, of how the team will decide, and of what each member has committed to do.