To play commercial games you need to own a psp, you need a psp to transfer the game to the pc, and borrowing a psp is out of the question since its placing the software in another users possession (IE you can't install your PC games on another persons computer with only one serial number), and lets say you get a game from PSN (Eboot.pbp) to play that on Jpcsp you will need a psp to decrypt it and transfer it back to the PC.
Edit:
If we find out someone doesn't own the game and a psp then no devs | user is going to willingly "Aid and Abet" that user.
The dev's spend alot of time coding Jpcsp and they rely on proper debug logs and maybe some actual psp data in some rare cases, patched or modified games can also give false info further breaking Jpcsp and wasting their time.
If you want to use homebrew only games on Jpcsp then a psp isn't required.
Edit:
If we find out someone doesn't own the game and a psp then no devs | user is going to willingly "Aid and Abet" that user.
The dev's spend alot of time coding Jpcsp and they rely on proper debug logs and maybe some actual psp data in some rare cases, patched or modified games can also give false info further breaking Jpcsp and wasting their time.
If you want to use homebrew only games on Jpcsp then a psp isn't required.
Try Out JPCSP Launcher v1.8.0.4 | How to post a log