1) wrong --
https://www.aei.org/op-eds/the-coronavirus-is-killing-thousands-so-is-the-lockdown/
2) I do not disagree a few (very few in fact) hospitals were overwhelmed. The vast majority of the system was able to handle it, and it wasn't because of lockdowns. The virus was spreading rapidly in early March and you saw those hospitalizations in mid-late March.
3) See above, they were indeed able to handle it.
4) NY IS denser, which is why it spread more rapidly there. Because other places are not as dense, it won't spread as rapidly. The "slow burn" was literally the strategy those who said we had to "flatten the curve" advocated for. This is a good thing as it does not overwhelm the system.
5) It is without a doubt a drop in the bucket compared to Spanish Flu. As you said, 50M died in that worldwide. This event has only killed about 430,000 to date, most of them elderly and with preexisting conditions. The Spanish Flu killed so many young, healthy people, in addition to the elderly. A totally different disease and far more virulent than what we're dealing with today.
6) Bottom line is the HK Flu killed approximately the same number of people when you adjust for population at the time.
7) I thought "wait two weeks" was the standard response among those who think this is the apocalypse. Now it's three weeks, or even 4-6?! LOL!