Except that will still sound good to some and not others. Ear designs are unique to each person, how the eardrums receive said audio wave is unique to each person. The dsp can tweak things to each person. Design and engineering is for the baseline, not as easily changeable in the final product.
We can agree to disagree! I put my high-end headphone money into transparency. I don't personally look for something that sounds most enjoyable to my ears, but something that is as close as possible as being there when the artist played it.
I understand that there's recording/mixing processing that occurs that inhibits you from getting 100% that, but introducing extra processing compounds the error. To me, the extra money I pay in a headphone (and dac/amp) is to get as much accuracy as possible.