That is indeed an interesting juxtaposition, and I'd particularly note the use of the word "enough." That would suggest that in discussions on the history of technology, it is implied that there is some arbitrary threshold at which mentions of the contributions of a minority group (not necessarily an identity minority; i.e. in a women-dominated field you'd say the minority is the men, etc.) will be disqualified.
For instance, it is indeed "mostly true" that black people did not make many contributions to the automotive industry or its technological development. Richard Spikes' contribution of turn signals (http://www.snopes.com/business/origins/blackinv.asp) is perhaps notable or even significant, but not necessarily critical, so this could serve as an example of that statement. Does that mean that the hypothetical phrase "White men invented the modern automobile" in a hypothetical article about a black man being ostracized from the auto industry in 2012 is racist? Or is it merely an acknowledgment of the fact that white men get the credit because they structured the industry to give it to them, by excluding everyone else? Or is it both?