How does deliberately chaining themselves to a limited (and stagnant) cultural/racial demographic help them grow or benefit as a business?
One would think that, as businesses that answer to shareholders, they would be doing anything they can in order to gain an expanded, larger potential market and potentially generate more income.
And really? DC and and Marvel would actually be hurting their sales by publishing/promoting more Black, Asian, Latino and LGTBT heroes in their comics?
It's a style, same as the infinite number of art styles in comics. And no one has seemingly trashed it, given the book's gotten plenty of high praise. Plus that's just one page.
There have been tons of issues in Bendis books where the characters have done literally nothing but sit/stand around and talk throughout the whole issue, and they still sell in the top 10.
There have been tons upon tons of books with some of the best art (coupled with the best writing) have still tanked.