If that was the case MSG, OVG, or ASM would build one on St Johns campus or next to Citi Field.
They literally just built TWO new arenas in eight years, in better accessible places than Meadowlands and Nassau...
Yeah how many events has Red Bull Arena had outside of soccer? The point remains that any metro area has a limit on the number of arenas it can support.
If you think NY can host another major league arena fine. Then that makes 5. I think it's 4. Either way it's not 6 or 10. Chicago has 2 + 1 minor one. LA (if you include Orange County) has 3 + 2 minor ones with a 4th major on the way. Phoenix has 2 major one + 2 minor ones. Even the local media in advance of the Tempe vote cast doubt on the arena being able to support a 3rd major one.
I divided your post in half, because no one is disputing the first part.
The dispute here is over how you determine the line. Those of us who sound like we're arguing with you are saying there's so many variables, that it would be impossible to know where the line is without some kind of complex math formula based on objective data that really only some kind of an event management expert could estimate. Versus "just counting sports venues" which is closer to what you're doing.
It's not even a one-for-one. "Events" is too broad.
Venues are all different, built for different purposes and configurations. And those things can take some kinds of events completely off the table. Whether it be "We need an oval shape, our show doesn't work in a boxy arena" or "the roof prevents those seats from seeing our video board show" or "we don't mess with arenas that don't have permanent ice plants" or "it's too tight to get our equipment to that downtown arena, so we just don't play there."
We have no idea how many events AREN'T taking place that could be taking place.
Because an arena isn't opening for an event if it won't make money off that event, it stands to reason that because of the cost of arenas, we don't have any way to test an upper limit at all. It's easy to point to Vegas and NYC as "Well, they have the need because NYC has 20m people and Vegas gets 40m visitors a year." But when you math out events to population, there's really no correlation of "it's one arena per 5 million people" or anything like that.
It's a person/relationship business. If the arena is waiting for calls to rent out the building, that's one number of events; if you have people in either arena or city roles who are actively trying to bring stuff to the arena and city, it's a totally different number.