If you're color blind, you change the palette in your terminal emulator so "red" and "green" become different colors you can distinguish. It even works for rarer forms of color blindness. This works best when people follow the de-facto standard.
If for something unrelated to good/bad looks good, I'm using red. Ditto for green.
Sure, if it was a status indicator and I used red for "good", I can see the point. But over the last few years I've had too many people tell me "Don't use red, people will think something is wrong" for things not semantically tied to good/bad.
People wear red clothes. They buy red cars. They eat red food. They date red heads. Red is OK.
