Wouldn’t think it was correct to say that AS was more _useful_ than Latin.
Well, if you were living in England it was. Reduce any complex subject down to about ten minutes and you’ll get statements like this.
EDIT: surprised that the Latin words for the genitals did not find use in English until the late 17th c.
Actually, it’s not that surprising. Before then, most clinical texts would have been in Latin, not English. Only when the medical texts started being written in English would there be a need to adopt a technical vocabulary. Lots of English people used these words before the late 17th C; they just used them in Latin contexts.