There's a good reason it's hard to un-make a decision that has already been made: the thrash is usually more damaging than the decision. A sub-optimal strategy is better than a series of changes in the strategy.

It's like in chess, when people talk about making "principled" moves. It means playing the move that best fits the plan you have been pursuing, rather than a tactically more tempting move that is less consistent with your overall strategy.