The answer to these questions is something you might not expect:
a phenomenon called “mismanaged agreement” - also known as: The Abilene Paradox
Keep your team from “going’ to Abilene
Many years ago, Professor Jerry B. Harvey’s research showed him that the fundamental problem of contemporary organizations is not conflict, but rather the inability to cope with agreement. He found that most agreement in teams is actually false consensus. This occurs because many people feel that they’ll be ridiculed or censured if they voice objections. This often leads groups to act on inappropriate goals and sets them up for organizational failure.