Well yes, I basically agree on most of this.
This is probably the one that bothers me the most.
Yes, of course. But my point was that closed borders, as mentioned on that list above, is usually (and not on this particular situation) concerning immigration policies and the such, and that that wasn't the way the virus was spreading. In a normal situation you don't close your borders to every tourist or to people coming back from business or vacation which are the ones that have mostly spread the virus so far. Of course given the current situation a complete closing of borders was the necessary thing to do.
Here for example the controls at the airports just before the virus arrived and while there were still few cases, were laughable.