Would you admit that both types of intercourse are dangerous, though maybe not "equally dangerous?"
With respect to the HIV/AIDS virus, that would be correct.
I would never suggest that someone have unprotected intercourse with anyone other than their spouse.
Returning to the article, this suggests that there are two factors that constititue the primary threats in regards to the spread of the disease and, because of this, they should be the primary focus of efforts to combat the disease and educate people about AIDS.
It never suggests that other risks be ignored; only that they be dealt with factually.