He never said anything about just sitting and waiting. The best thing, he said, is to destroy enemies plans, the next good thing - is to destroy his alliances, third thing - is to destroy his armies and the worst one is to seige cities.
Whatever was NATO's plan - it was ruined, US is losing allies and armies and even American cities are infiltrated by foreigners.
Actually, you are wasting resources. What is much more important - you are wasting them with pretty poor effectiveness.
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Sun Tzu said: Raising a host of a hundred thousand men and marching them great distances entails heavy loss on the people and a drain on the resources of the State. The daily expenditure will amount to a thousand ounces of silver. There will be commotion at home and abroad, and men will drop down exhausted on the highways. As many as seven hundred thousand families will be impeded in their labor.
Hostile armies may face each other for years, striving for the victory which is decided in a single day. This being so, to remain in ignorance of the enemy's condition simply because one grudges the outlay of a hundred ounces of silver in honors and emoluments, is the height of inhumanity.
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