If you are unwilling to read a features list or otherwise do not believe it, there's not much I can do to convince you otherwise. I'm sure the already released iOS 8.2 update with these said additions in the build logs wouldn't either.
I hate to be blunt here, but things in features lists and press releases/videos, you know - the things that a company like Apple is telling you .....]
I'm not interested in flaming but can I suggest you listen and read what apple are saying again. In all the official articles and videos I have read and seen, which are limited in number. Apple never mention the watch is a medical or even a health device that I have heard/seen. They cleverly only ever mention health in the phrase "Health and Fitness". And they repeat it many times precisely the same way. Its others who use the term health in isolation.
I don't for a minute suggest that fitness is not an important aspect of hearth or the opposing sedentary lifestyle doesn't have a negative impact on health. Also heartbeat rate can be used in medical determinations especially in the context of activity in the case of the device. All very important aspects.
But diet, genetics/family history and medical conditions all have a major part to play in heath and the health context of an individual; Blood pressure, heart beat pattern graphing(ECG), blood sugar, BMI and weight are also important aspects, all of which are revolutionary features and none of which are natively present.
Of course software can fill some of the gap there but the point I am making is that the watch does not do that natively and offers nothing more as a device than the competitions device at this stage.
That is a missed opportunity dont you think?
Even though its a pretty neat idea. If you have two arms at least.