SantaCon is horribly annoying, laden with d-bags, dont get me wrong but (i) it is most definitely not majority tourists, there are Santacons all over the country and the NYC one is chock full of New York area born and bred d-bags, and (ii) it is hard to see how Santacon could be accused of being a superspreader given most of it is taking place outdoors or in specific, d-bag filled bars.
Omnicron is spreading on transit, in supermarkets, in offices, because its so transmissable and its impossible to fully isolate oneself from THE AIR without another lockdown. Fortunately, if you are appropriately vaccinated (ie, had one in the last 6 months) the chances of getting very ill from Covid are slim to nil. That won't save Broadway from cancellations, that wont save our hospitals from overcrowding, the anti-vax (and their hypocritical politicians) are abominable. But at least, unlike in March 2020, we know how we can stay largely safe.