I wouldn't call HCB names... Even if I felt his opinion was a little damning of my own personal approach to anything.
I'd listen, or re-read what he said. He speaks from a lot of experience making a lot of significant photographs.
If his comment is hyperbole, then take it as an opinion worth hearing. He spoke from experience with a view towards helping.
I am sure he wasn't just mad that he would have to use an M-2 to see the framelines.