Sure, but just because he hasn't designed an interface doesn't invalidate his opinion. His opinions are mostly from the perspective of his field, which in some ways influence user interface design.
Many user interfaces use elements (he did invent sparklines) and principles he has talked about in his books.
I mean seriously, if Joe User criticizes a user interface is he wrong because he hasn't designed an interface before?
Many user interfaces use elements (he did invent sparklines) and principles he has talked about in his books.
I mean seriously, if Joe User criticizes a user interface is he wrong because he hasn't designed an interface before?