You are right to some extent. But there are huge differences between all the wars the US has fought and is currently involved in, and a China-Taiwan war.

Taiwan is only a couple of miles from mainland China at its closest point. It is possible to land large numbers of boots on the ground. Next, unlike the US, the Chinese govt is not dependent on the approval of its citizens for waging a war. It exercises complete control of the media, and squelches dissent immediately. AndIt has the largest navy in the world and a relatively modern fleet, and the supply chain is very very short. The US has no leverage over China.