My post may be stupid - eye of the beholder and all...
But, to your valid points:
1. They are not at fault for the origin of the virus. You could make this argument through all recorded history unless you opt to destroy every pig, cow, bird and bat on Earth. Viruses are going to mutate, and they are going to spread regardless unless you exterminate their origins. It could have been a bat that did a shit on a car door. Tomorrow it could be a bird that shits on your kids soccer field and they roll the ball through it. Tomorrow it could be a mutated virus that turns Mad Cow Disease into a global spreader.
The international aid that could have been offered to China a month ago would have been...what? Help with 30 people? Some good doctors that would have done what? The same bloody thing. The only thing that you could have done in this situation was quarantine earlier, and how do you justify that with a handful of cases? China going to the WHO a month ago would have gotten the response it got just a week ago - not a global emergency and thats when we had thousands of cases, but you think when they had just a handful they would have gotten anything other than "knock of the big scare".
If we actually expect China to have implemented draconian quarantine a month ago, then by all rights every other country now with a few cases must also do the same thing. But they aren't. And they won't. Even though a global emergency has been declared. What the USA and a few other countries have done won't stop the virus, it will just buy a little more time. They could have done far more.
2. True. But the vast majority of hospitals in the USA are private, you don't really have a public health system.
3. The health of the average american is below that of other advanced countries. Your health system here is not as grand as you think it is. Your life expectancy is lower.
4. If this country can fucking afford 11 aircraft carriers and a trillion a year in military, then yeah, it can fucking afford a warehouse with a standby operation for the inevitable arrival of a virus like this. What that would cost for a year would be less than the Military uses in a day. So no excuses on this.
5. You can do this, I don't really see your point, china will do it if it has to, but in all probability, social distancing by having people stay home is much more effective.