Well, those asymptom case can also infect others. In all likeliness they will infect others, multiple others. So if epidemiological root trauce is done right, we would find those asymptom carrier.
This doesn't mean those cases are "asymptomatic". Most people who get the disease fare about as they would with a flu. I'd also venture to guess that most people do not go to the hospital unless things are really bad (e.g. they can't breathe on their own). Furthermore, because not everyone at the hospital gets tested, I'd also guess that there's a number of cases where deaths are misattributed to plain old flu, too, since it's the flu season still, and some of those who are dying "of coronavirus" would have died regardless.
Well. How is common flu any different? Most people don't get tested and they just recover, if any, a lot more don't. So seeing those two numbers on the same page should mean something, even if you doubt the accuracy based on the assumption a large quantity of people aren't tested.
