I would say its even more simple than that. Logically speaking in what conditions can the US beat China 9 out of 10 times if it comes to a Chinese operation to pacify Taiwan. If its China vs rest of the world then he might have a point. Its wishing thinking on the part of US planners if they think Japan, Korea, India, Philippines the aussies will get involved.
I dont see how the US without the support of countries close to Taiwan can win so far from home, they wont be fielding all their carrier groups thats next to impossible.
You have the same issue with the lizard guy.
You have the war the other way around, it's not US against China, it's China against Taiwan with US involvement.
First of all, you can't draw the US into this war without drawing at least Japan into this war as well, secondly, the battlefield is NOT going to be on the Chinese Coast, but will be around Taiwan, and particularly the Eastern part of Taiwan.
As I explained before, China do not have enough sea power to project power on the other side of Taiwan coast, if they do, they are cutting off their own SLOC, and they WILL BE chasing the US Navy in the open ocean instead of in the confine of the Taiwan Strait.
On the other hand, logistically, US could have3 supply route to support their force, one from Japan down, another from Philippine/Singapore Up and the last one is directly from the Mariana's. Unless China can successfully interdict all 3-supply line, this is not going to stop the US from engaging the Chinese.