>>104769115Because the context is wildly different. In Danny Phantom, they establish with most of his early enemies that ghosts are manifestations of the dead with powers, such as the lunch lady, Box Ghost, and the nerd ghost. The hint was that the otherworldly creatures were either natural habitants of the ghost realm or dead creatures from other worlds.
Then out of nowhere Ghosts are basically just aliens with no actual explanation to how the other villains were alive at some point.
With Ghostbusters they make clear early on that the concept of a “Ghost” is from a specific energy source that fuels all sorts of beings, not just those that have died. That means you can get a warlord like Vigo who died, or a god like Gozer who simply has the same energy signatures.
