Regardless of all other factors, there is a substantial segment of the population that would never want to live in the climate of Green Bay and lots of the midwest. It's just too cold for some. A lot of people love bright sun, hot beaches, swimsuits, etc. Others love mountains, white water rivers, etc. There are places that offer those things, some with only a very mild "winter," if any. I personally love to VISIT Green Bay and think it's a great place, but I would not want to live there. It's just too cold, flat, and gray for me. There is spectacular beauty (I love the lake coast, Sturgeon Bay, etc.) and periods of nice weather, but that's the case for almost anywhere. Very few places on earth offer zero natural beauty or outdoor activities, especially those that are large enough to have an NFL team. Even the desert is incredibly beautiful once one learns to appreciate it.
I would certainly live there if I was paid an NFL salary, but I'd probably be staying elsewhere for most the off season. I'm sure a lot of athletes feel like if it's going to be cold and such, there should at least be a big city like Chicago, Minneapolis, and others. Sure, there are "things" to do in Green Bay, as there is everywhere else. But some people just love cities. To each their own, I suppose.