Chinese startups getting locked out of the 90% of the world that is not China is quite bad for them, as would be the deleterious effect of downstream firms that use Chinese startup inputs to improve business practices since they would have toChinese startups will do exactly that in China once they know that something works in the US and might also work in China.
1) buy foreign and when Chinese startups get there, reconfigure their business, at substantial cost, to support local protectionism or
2) go without new innovation and run less efficient businesses or
3) wait for Chinese startups to develop (but if they have local protectionism - startups will have no incentive to innovate); and thus have more inefficient business practices