The fact that it's in over half of our counties now shows how widespread this issue is. I think the total number of confirmed cases is not anything to overreact about, but it's also not something you can completely dismiss. As that number goes up, so does hospitalization most likely. The important thing is for the percentage of hospitalized be at a good amount or for it to keep lowering. If our positive cases start doubling as well as our hospitalized patients, we're in trouble.Of course confirmed cases is a function of tests, but it's also a function of people actually getting the disease, so for predictive purposes it's about all we have.
The problem is looking at deaths and hospitalization vs. total population is worthless when the disease is in it's early stages. By the time it becomes a meaningful number, there's not really much more need to predict anything anymore, at least within that same region. I do agree, though areas that appear to be further in the process can give some idea of what to expect based on deaths and hospitalization vs. total population of a region. However, population density, action taken, demographics also play a big role, so that makes comparisons across regions more difficult.
People are using hospitalizations and deaths vs. confirmed cases because confirmed cases is the best we have, unfortunately. I agree that positive vs. negative tests is potentially a useful number. Similar problem, though, unless a high percentage of people being tested have had confirmed contact with someone that tested positive I don't think it tells us much about transmittability.
Overwhelming our healthcare system is the #1 issue here.