I get it man, ride for your city, but a lot of your argument is just inaccurate.
PNC is loud and I'd go to every single Canes game if I could swing it. But there's a big difference in filling a 20k seat indoor arena vs a 75k seat outdoor stadium. ESPECIALLY when the product on the field is almost always bad.
Also, as much as I loathe the entire state of SC, the Panthers still claim them. Moving to Raleigh would basically alienate a large portion of the fan base.
Raleigh is cool, but it would make very minimal difference in attendance if the team was moved there.