In the piece The unintended consequences of a too-nice work culture Jonah Sachs talks about how in nice workplaces people are so attuned to each other's feelings they assume the path to success is measured by being nice or how good they make others feel just as much as the results they produce.
A good way to make people feel good and appear competent in meetings is to repeat and repackage information that everyone already knows. People start nodding their heads in agreement and what ends up happening is that critical thinking starts shutting down. People don't want to share oppositional ideas to dampen the mood of the room.
The result? Well this actually leads to poor-decision making and hinders creativity. It also limits the views of those in non-senior management positions who tend to be women and/or visible minorities as conversations tend to lean towards the ideas the top bosses hold.
I'm definitely going to start paying more attention to this dynamic in meetings and will try out the tip to write down the key pieces of information I want to share before the meeting so I can refer to it in the meeting and not feel pressured to keep my thoughts to myself for fear of not appearing nice.