You are so right. There is a reason why PC and arcade monitors work in RGB.
But in addition to that, there is no cross-talk, no dot crawl, and all the other weird artifacts of composite video. Also, no chroma modulation means that it was much easier for TVs to support both 50 and 60 Hz. I only ever had a GameCube, but being able to play in RGB at 60 Hz was amazing.
At least in Europe, many old consoles* provided native RGBS output, and with the proper SCART cable the video quality was awesome. Nowadays, people in the retro gaming community go crazy with PVM/BVM and other fancy professional monitors with RGB input, but the French already had it figured out in the '70s!
* anything from Sega, Nintendo SNES~WiiU, the NeoGeo, Sony PSX~PS3.
But in addition to that, there is no cross-talk, no dot crawl, and all the other weird artifacts of composite video. Also, no chroma modulation means that it was much easier for TVs to support both 50 and 60 Hz. I only ever had a GameCube, but being able to play in RGB at 60 Hz was amazing.
At least in Europe, many old consoles* provided native RGBS output, and with the proper SCART cable the video quality was awesome. Nowadays, people in the retro gaming community go crazy with PVM/BVM and other fancy professional monitors with RGB input, but the French already had it figured out in the '70s!
* anything from Sega, Nintendo SNES~WiiU, the NeoGeo, Sony PSX~PS3.