NY is a different beast. High population, port city and mismanaged politics. Have they completely shut down mass transit? No. And they will have more cases, higher death rate and ongoing problems. But to treat the entire US as if we are the same, is stupid. And the death rate is distorted due to the hype and media. If you are compromised, the flu kills you the same way.
You are equating NY State with NY City, something I've been careful to avoid doing. I didn't suggest that, without precautions, the country as a whole might've ended up looking like NYC. Instead, I suggested the possibility that the country as a whole might end up "half as bad" as NY State. By the very nature of the exercise I had to guesstimate the numbers, and I was very open about the fact that I was doing so.
For a more appropriate comparison, you have to look at smaller areas than an entire state. I don't have the resources to do a detailed county-by-county comparison, but I did take some time to look at a few NY counties to create a frame of reference.
Start with the 5 boroughs / counties that make up NYC. The mortality rate there (with full precautions) is already over 0.2%. It will probably cap out pretty close to 0.3%. You are right that there is no county in TX that aptly compares to NYC.
Next, slide out to an adjacent county -- Westchester County, NY. This is considered a suburb in New York, but its pretty urban by most standards. By way of comparison, its population density is 2,250 ppl/sq mile, which is sandwiched between to the densities of Harris and Tarrant Counties (significantly lower than Dallas County). The mortality rate in Westchester County is 0.12% (12 deaths per 100,000 residents). It is on pace to cap out pretty somewhere around 0.15%.
Further out is Orange County, an outer NYC suburb. By way of comparison, its population density of 471 ppl/sq mile is roughly equal to the density of Montgomery County, TX. The mortality rate there is 0.06%, which is 60 deaths per 100,000 residents, and is on pace to top out around .1% (100 deaths per 100,000 residents).
Then there's Columbia County, NY. Its population density is 99 ppl/sq mile, roughly as dense as Hunt County, TX and Victoria County, TX. The mortality rate there is 0.026% (26 deaths per 100,000 residents).
Most people (apparently,
@Phil Elliott excepted) agree that with lesser or no precautions, these rates would've been higher and the disease would've reached further geographically. Nobody knows how much higher or further -- that is inherently guesswork. But any reasonable person looking at the above data would concede that a US mortality rate of 0.5% or higher would've been within the range of reasonable possibility. That is all that I claimed.