They teach this in audio engineering school :) But the reason this is not widely talked about is two fold: First, because those measurements are heavily room

They teach this in audio engineering school :) But the reason this is not widely talked about is two fold: First, because those measurements are heavily room dependent and they sound worse than treating a room. Because the room affects the sound in ways that EQ can’t really fix anyway. Second, because the goal of mixing and mastering is making music sound good in a big variety of speakers and environments.