As someone who grew up in the NYC pizza area, but has lived in the Boston area for a few decades, this is incomprehesible to me. While there is some very good pizza to be had in the boston area, it is from very individual places, whose pizzas do not constitute any cohesive boston style (and some of which are NY style).
What I would call the closest thing to a regional style is the pizza from sub / pizza shops, usually run by greeks and so sometimes called greek pizza, which tends to be cheese heavy (and i’m not sure what the mix is, definitely not just mozerella/parm), and lacking in the sauce department, to my taste.
I’m sure there is bad NY pizza, but good NY pizza has a tastier sauce, thin crust, and a good cheese balance. And unless things have gone downhill since my last visit (which is certainly possible) even your average NY pizza is pretty decent.