Why are you assuming the number of infected in Hubei is so much higher than reported but not the number of dead?
I think that due to edicts from on high and the total breakdown of the health care system in Wuhan the numbers from there are meaningless. There is circumstantial evidence and some reporting that the number of dead is much, much higher, but how can we know for sure?
As I stated in my post, I am estimating the number of infected in Hubei province by the number of people that got infected on that Princes cruise ship who were made to be in close proximity to each other for an extended period. I agree with you that the number of dead are probably underestimated, but you have to work hard to get rid of bodies. The virus does not have to work hard to infect a crowded city of people forced to stay there.