You can call and count things however you want. If you have a steady light source I'll go one better and count it for you - one, because electromagnetic radiation is not somehow switching on and off automatically.

That would be like you turning your stereo on and off and declaring the sound to be sound particles. You can do it, but you're ignoring physical reality.

Computers work with alternating voltages, but that doesn't make them 'electricity packets' or 'electricity particles'.

Electromagnetic radiation is going to be a magnitude at a certain frequency over time.