Not sure how that makes my post more precise, but never mind.
You have to remember that the number of people "in a serious or critical condition" doesn't directly implicate the virus with the seriousness of their condition - it literally just means the number of people who have tested positive for the virus who are currently seriously ill (but that also includes people who were already ill prior to infection).
While it is likely that a fair number of these cases are a direct result of infection with Covid-19, it shouldn't be assumed that the virus is wholly responsible for why each person is now seriously ill (or has died). A crude example being, if someone with terminal cancer gets the virus and passes away, it is not possible to say how deadly the virus was to that person because of their underlying condition. In some cases, it might have had little to no impact, in others it might have been the proverbial straw that broke the camel's back - and in others (the worst-case scenario) it may be the sole reason that someone has become seriously ill. In reality, it will be a mixture of all of these.
To put things in perspective, if the same proportion of people get admitted to hospital each day in China as they do in the UK, then that means that well over 750,000 people are admitted to hospital in China
every day. In the 2 months since this outbreak began, that means a staggering 50 million people have been admitted to hospital in China, and over 400,000 in the city of Wuhan alone.
I suppose the real question is, how much more likely does the virus make developing a life-threatening condition? That's very tough to answer, but
I wouldn't be too alarmed by the raw numbers without a more detailed analysis of what impact the virus actually has.