at certain point, the lens industry is more for other things than the iq. canon l lenses are a good example, dust free, build quality (fine for me on this), af, optical is (fine for me in certain situations). they are working horses, but not creative tools.
use another example, vintage voigtlander heliar lenses are so good for portrait. not sharp, but good enough, great oof, just right on the spot for human faces, even better in bw. even 50 years ago, they did it right.