这里许多网友没搞懂的是美国的战略目标是阻止中国成为亚洲的区域霸权，保卫台湾只是达到这战略目标的手段 …

“Colby believes China is seeking regional hegemony over Asia, which he believes to be the world's most important region, and will achieve that goal if not stopped by the U.S. He says that if China is allowed to dominate Asia, it would severely diminish America's future prospects and freedom of action, push the American economy down the value chain, and lead the U.S. less resistant to Chinese pressure.[14][17] He believes the best way China would achieve regional hegemony would be by attacking a U.S. ally or quasi-ally, which he identifies as Taiwan. He advocates for a "strategy of denial" to deny regional hegemony to China and stopping or defeating a potential invasion of Taiwan. ”

Reference: https://en.m.wikipedia.org/wiki/Elbridge_Colby