All solar revenue streams are dependent on political decisions. Japan, EU, US, China. It is all controlled by politics. How long do you think Chinese names can continue to ship ~2GW of modules to Japan each quarter before politicians pull the plug on that? Last I heard there is a huge amount of tensions in Asia right now between Japan and China.
Global demand is essentially has four legs; EU, China, US & Japan. Saying that you can remove one of those legs and the table will be just as sturdy is nonsense. Yes, Jaso doesn't ship much to US, but if that market shuts down to mainland companies, where do you think they are going to turn to place their modules? Sweet Japan and other locations that Jaso is very strong in. Look at the pricing JKS targeting in the US as a good example of the competitive pressures that suddenly arise when a company needs to move product.
Remember, the market is not looking to analyze things from a very high level; the default mindset is that solar and China are junk. The narrative needs to be spotless for the market to decide otherwise. People here are very good at partial differentials and multivariable calculus, but remember the market is only looking to do basic addition/subtraction.