What the author apparently fails to recognize is that the biggest challenge for the entrepreneurs and businesses trying to serve her "unexotic underclass" is access to debt financing.
Venture capital is not appropriate for every type of venture. While there's a strong argument to be made that venture capitalists would be wise to make a conscious effort to give greater consideration to businesses run by and targeting people who don't look and live like they do, the reality is that the economic structure of venture capital is incompatible with the majority of businesses that require capital. Put simply, for every business for which equity financing is appropriate, there are probably a hundred or more for which it is not.
If the author wants to see more businesses serving the "unexotic underclass" and serving it well she should focus more on the market for debt financing and not the market for equity financing.