His technical skills were astonishing, Schewe to the contrary notwithstanding. If you don't believe that, find an early Leica -- say a Leica II, and load it with film of about ASA 30 (for you kids: that's the same as ISO 30.) I'm not sure what speed film he had early on, when he did his most interesting work, but I'm pretty sure it didn't reach ASA 50. (There was no ASA rating in those days.) Now, go out and shoot some street and see what you come up with. Ain't as easy to get technically superior results as you thought is it?
Reminds me of my first days with photography when I was totally obsessed with the idea of the value of fine grain, something gleaned from the amateur photography press. I was trying to do stuff with Pan F and Panatomic X, and an important thing I learned was that if you made the neg thin enough, it printed quite well. The next thing I learned, the most important one, was that worrying about such things as grain was a diversion from reality, the reality of making a picture that means something. Even then, the techies cornered a lot of press...
Rob
P.S. Just realised: as I often add fake grain to digital stuff, I suppose I can say that I have stood firmly by my earlier convictions, proving that fundmental beliefs can hold their own through the decades. Of course, for some pro work, grain wasn't allowed to "intrude", and add its own dynamic, so one shot accordingly. Shows very clearly the strength of character of one Sarah Moon and relative weakness of my own in the face of such commercial pressures! Another such pressure came my way one fine day as I stood in a fashion store's AD's office looking at some snaps I'd just delivered, when one of their top dogs walked in and remarked: that's not a good fashion picture: there is no eye contact. AD and I stood silent, glanced at one another, and waited for Big Dog to wander back to the upper kennel. The shot ran, immaculately grainless.