Well, this isn't about any particular situation. I also have no problem actually making a decision when I need to. However, I do look back on my decisions and, given time to think, I realize it would have been better to do something else. The problem isn't my ability to decide, more it's bothering myself about what the decision was after some hindsight. The problem is that sometimes it's improper to go back on a decision, because you took charge and made a decision, and going back on it is, by then, less effective still.
My problem is continuing to support a less than ideal decision. I consider it a virtue to admit when you're wrong, but leadership in the Army strongly encourages not doing it. At least, not to your subordinates. With good reason, too. You don't want them to second guess you all the time, too.
But I still respect someone more for admitting they were wrong than for continuing with a decision that's ineffective or bad even after considering the situation. Even if going back on the plan is more bother than it's worth, you can at least admit it's not the best plan that could have been done, but it's what's happening so let's do it.