Who has the right to determine what is "necessary?"
What if it turns out that you are wrong?
It's not a right as much as an obligation. If you stand still, it's just nature, the next person with a lesser value set might move up. You have to trust that you have the highest set. Otherwise, people who don't care about right or wrong are going to fill the void created by your failure to move forward in the way you considered right.
Then you'll really be up the creek.
If it turns out you're wrong, you accept responsibility, you regret your actions, you carry the guilt, and you be a better person for the next decision.
BTW: What makes Aikido to me is learning to be a man the best I can.