One of Amazon’s fourteen leadership principles, “Bias for Action” states “Many decisions and actions are reversible and do not need extensive study. We value calculated risk taking.”
When faced with an important decision, inaction is usually your worst option. There is little to gain if you don’t act. You only stand to lose out on an opportunity- either to succeed or to learn from your mistakes.
Note the difference between inaction and purposefully saying “no”. The latter permits you to opt for another course of action to pursue instead. The former leaves you unable to move forward.