That's the reference.
Some items - microphones particularly - deviate from that because they can be chosen to deliberately colour the sound. But the reference itself isn't news. It's been a thing since at least the 1950s. The only difference now is that the standard is a lot more achievable and affordable than it used to be.
I doubt there's a single pro or semi-pro producer or engineer who isn't aware of this.
All but the very noobiest noobs understand that mixes need to "translate" to a variety of different speaker systems, from cheap earbuds, to car stereos, to high-end hifi.
Making a mix that does that needs good monitors, or at the very least the kind of skills and trained ear that can make a good mix on budget equipment. (Which is certainly possible, but harder to do.)
At the mid/high end it's just not an issue.
If you don't like the EQ on something, understand it's there because someone wanted it that way. It's very unlikely to be because because someone couldn't hear what they were doing.
