On the other hand, if I have a health-related search, I run it through Google. DDG has the proper content. It's just that it priorities the blog spam. That's an algorithm problem.
Relieving the former, as the author's proposal would do, makes DDG more competitive. As a second-order effect, it would also let DDG priorities resources towards the second problem, making them more competitive still.
Bing does have the reputation of being better for NSFW searches than Google, so I guess that it's normal to have more NSFW false positives as well.