Everything in life regarding human nature that measurably is changeable by the human in question follows a simple three step process:
At first it is a decision the human in question actively can make. He takes full responsibility if he actually decides. It stays ambivalent, if "too much" time passes regarding the context, if he doesn't make the decision. Sort of in a quantum state, so to say.
It may or not become a decision to decide on or "rule" a result by another human or a group of humans than the human in question nonetheless has to take full responsibility for. Even a sequence of decisions made by other humans is possible to force a "result" and its consequences occiasionally happens.
(Look at how a justice systems operates, e.g.)
If neither case 1 or case 2 are apply-able or the decision isn't made in a "useful" time-frame regarding the context: It becomes a coin-flip in the most wide sense. An experiment with possible outcomes that are very hard to predict in some cases.
But in every case there will be a result somebody has to take the responsibility for. Most likely the human in question that decided to "not decide" for too long, so to say.