Your interpretation of the data is also just flat out wrong. You can't divide cases from today by deaths from today and get a case mortality rate, because deaths lag cases very significantly (2-8 weeks was a number studies were showing early on, not sure if there's a more accurate one since). A month prior to the latest day with a deaths number (01/04) the 7 day rolling average of cases in NYC was 2404 (data from my link above). That's also an inappropriate number to use, given that the recent giant spike in cases means that a disproportionate number of deaths will be from relatively recent cases, but it serves to demonstrate the point about your derivation being completely inappropriate.
A 0.1% mortality rate is also really bad if you're talking about students, but we're not, the data your citing is for the entire population... for the entire population it's just bad.