A team should be the safest place to be. Teams that work together for a long period of time should develop healthy working relationships that can turn into friendships.
As we learn to anticipate each other, we begin to move together with more efficient communication. Thought processes begin to be shared as the team learns through shared experiences. This adds to their familiarity as a deep history is built and shared. That history is fertile ground for trust to develop. Consistency is a catalyst for a perception of safety. The same people reacting the same way over a long period of time builds familiarity that deepens trust.