You could ask the same of many of the responses. All of your examples are "strong" responses that reassure the public, like the flight restrictions which public health experts have argued against. By the way, public transport is, and has continuously been, running in most cities in China, and people in many cities (I have direct knowledge of Beijing, Shanghai, Guangzhou, Shenzhen, Zhuhai) are now slowly returning to normal life.

Since when has China been ready to move heaven and earth in response to the fears of its citizens?

Because they're an authoritarian state, grasping at straws, and they can. The new politicians in Wuhan are connected directly to Xi, and they're doing all kinds of stuff that has no scientific basis, just to be doing stuff.

Please share some of the (numerous, I’m sure) statements by public health officials and epidemiologists crying that China is overreacting.