There are scads of other fairly survivable and also deadly communicable diseases. Smallpox is deadly but not that communicable by air. There was a large pool of resistance/immunity in the population. Edward Jenner noticed in the 17 hundreds that milkmaids did not get small pox because they had contracted cowpox from milking infected cows and this seemed to transfer immunity upon them. This gave Jenner the idea for vaccination, which arrested the march of smallpox by the general dissemination of the vaccination procedure.
What we are talking about is the pathology of the disease, not the survivability of it, or the likelihood of dying, really. And it is fairly communicable. Before you poo poo our perception that is containment is unlikely you should reflect on the containment of the far less communicable blood borne illnesses, like Syphilis, and Aids, and ask yourself how it is that they have spread so assuredly. (one factor is long incubation time, and difficulty of testing during the incubation period.) Then you should consult with disease pathologists and ask them what the likelihood that the disease will be stamped out by containment efforts is. When they look at you and shake their head, and say. "we hope that it might be, but in reality... nowhere else have we seen" ... and their voice trails off. You should get the general feeling what the true answer is, i.e. "We cannot guarantee that it will not spread with inexorable progress and with as great rapidity as the common cold does, just that it will have far more ferocious results."
Right now there are 9 people dying per day in China. The discharge rate is what counts here, as there are only 4000 people known to likely have the disease. If it is in tune with current figures, the discharge rate of healthy survivors, with or without immunity may be 90 per day.
Compared to an outbreak of bad influenza in China, this is a miniscule death rate in toto. So why worry? When Shanghai "B "swept through China in the 1980's it killed 350,000 people. that is up to 3000 per day. The difference is perhaps 100 million people got infected with Shanghai B in China. So the death rate was perhaps .35%. And those were only the far weaker people like the very young, or old and already sick. While corona virus picks off those, it also picks off healthy people in their prime, and kills 30 times as many per infected person.
The strange thing is in the US, the total deaths were far less and far less per infected individual for this serious flu. It could be predicted that people of advanced age, in nursing homes, and already ill, those prone to bronchities and pneumonia, would die. With Shanghai "B" perhaps 5000 such people died in North America. Only one person, probably by choking in coughing in Toronto. Flu vaccines probably saved many who were more prone to illness.
It does seem like the death rate upon contraction is about ten per cent. Or on the bright side, the survival rate is about 90% or perhaps higher if you are healthy and fairly young. The survivors may have some resistance from exposure to coronavirus in the past, as it is a ubiquitous illness in its milder forms.