The author didn’t use those words “just because”. Game-based security and simulation-based security are two different styles of security definitions used in cr

The author didn’t use those words “just because”. Game-based security and simulation-based security are two different styles of security definitions used in cryptography, and we differentiate between them for good reason: game-based definitions are typically weaker (in that they capture less adversary behaviour) than simulation-based definitions. Also, they have nothing to do with “video games” or physical simulations therein.