> I don't know how these names are assigned or created, but regardless when you have something like "Mad Cow Disease" instead of Bovine Spongiform Encephalopathy it's more likely to be covered and even sensationalized by mainstream media.

I don't think you've established this though. It may be more likely to be covered for entirely unrelated reasons and have that name as a consequence or coincidence. You're confusing correlation with causation.

> The term “crack baby” is an urban legend masquerading as a medical diagnosis

There are thousands of these and the media doesn't play up let alone care about most of them.