How can you be 100% sure? Influenza kills hundreds of thousands of people a year, not all of them were already on death's door. How can you know your next bout of influenza won't set off a cytokine storm that would kill you in hours?
You seem to misunderstand some very basic statistical facts. The ~2.5k aren't the total number of infections, those are confirmed infections - people sick enough to be admitted into a hospital and administered a test for the virus, or people interviewed by medical authorities due to contact with other confirmed cases and tested positive for the virus. This is smaller - probably far smaller - than the total number of infected, which isn't known. There are people walking around with it who won't show symptoms and would never know they had it.
Your thought experiment of infecting six random people and seeing how many survive is an attempt to estimate the lethality of a virus given the total number of infections. That simply isn't known in this case.
No, it doesn't look like influenza at all. So far it looks much milder than influenza, which infects millions and kills hundreds of thousands each year.
Agree with the stats. If anything the infected numbers are FAR greater than the 2.5K reported. Which sends mortality rate down but this is assuming the reported mortality rate is both honest and accurate. It's not certain these are accurate even if the reporting is truthful. Maybe they have not counted many deaths as caused by novel Coronavirus. Some acquaintances in China are saying hospitals and doctors are not able to verify cases and just recommend people showing signs to stay home. It's difficult to say what the real infected numbers are and almost as difficult to have accurate mortality rate.
Influenza kills more people than most are aware of but it's not in the hundreds of thousands. One figure I say was 89,000 globally in 2017 IIRC. And this is not just for influenza but all influenza like respiratory illnesses combined. Of course it's also an estimate since some nations do not have the means to keep accurate and reliable records.
This new virus is tougher than average influenza and combines pneumonia as a likely potential development. It's more horrible than some on this forum are making it out to be.