It's important to take these wargames with a grain of salt. The US knows a direct naval conflict with China won't be pretty, there's almost certainly no intention of fighting them if China decides to press their advantage. But we don't have to "beat" China, we simply have to deter or outlast their desire to capture Taiwan.

There are innumerable possibilities if the US assists Taiwan, especially through the lens of hybrid warfare and not pitched battles. We have no motivation from a strategic standpoint to give China the naval war they want, so why would we?