That's because this is how it was,
Game came out for DS, then it was ported to PSP with the Multiplayer AD-HOC features and extra story missions (Melanie's storyline), expanded radio stations, and mission replay.
Then it finally it came to...
How does this run compared to emulation via OpenGL PPSSPP nro?
CPU and GPU util seems to be lower (Edit: will need to figure out if it would be even possible to migrate my save)