If the newly added people are part of the decision team, a new version of our holistic goal will be developed that encompasses the holistic goal of each individual. The inclusiveness of the holistic goal follows the inclusiveness of the Whole. Nevertheless, it is better to be more inclusive than necessary, rather than exclude those who may become important resources, if not among the decision makers. People will usually decline to participate in decision making if they do not have a balance of risk and potential rewards. This often is what good neighbors do for one another.
Diversity is a strength, when coordinated for a common goal.
I suggest that we may fail to act early because of fear. Furthermore, if these actions are incorrect, the low investment has fewer poor side effects. Our reluctance represents fear and learned responses from past experiences, based on less effective or incomplete decision making procedures. This is one of the initial reasons some people are cautious to begin managing holistically. Think of riding your bicycle.