"In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing."
Theodore Roosevelt (1858-1919) 26th president of the U.S.
You might think Mr. Roosevelt overstated the value of action; clearly there are times when no action is preferable to the wrong action.
But notice he qualified his statement as pertaining to "any moment of decision"; the point in time where making a decision is mandatory regardless of how well prepared you might be.
Still don't see it?
Think back to school. You are taking a test and have one last question to answer. Get the right answer, you pass. Pick the wrong answer, you fail. Choose not to answer you also fail.
What would you do?