From my experience there are very strong currents in a group that are very hard to go against as an individual. Only very contrarian people will go against the grain in formal meetings with high level executives or other individuals with status in a group. This is why often big organizations are able to produce decisions that the team behind it doesn't agree with and that look silly from the outside. Many people in such a team will not feel personally responsible because they feel like they didn't have any influence on the decision making proces, even if they could have said something. There are other dynamics at play I think, but this is one of them. (The contrarians seem to not survive long in the corporate world)