RGB curves - Why does adjusting the G curve also result in a change in R and B channels?

[sovereign (Matteo Costa)]

@ggbutcher

Reading your posts, I think you probably need to do some research into the color management mechanism in whole.

Since you went through it already, could you point us to any good resource ?
In other pixel editors manipulating one channel does not affect the others.
But it is also true I can’t try editing in ProPhoto there because it is not supported.