True, and I agree. Every coder that deals with graphics in some contexts should know Gamma. That knowledge would have been useful I think once in my profession

True, and I agree. Every coder that deals with graphics in some contexts should know Gamma. That knowledge would have been useful I think once in my professional career and only because of some specific stuff. There's no hard/fast rule, but there are several more important things that coders in general should know before Gamma.