I always figured it was due to liability. WebMD wants the monetizable traffic but not the liability of ya know, providing health care. So they profit off of the user's duress and just recommend they see a health care professional anyhow.
Amazon reviews, for example, have lots of terrible medical advice in them. Go to an apricot kernel page and look at the product reviews. I just did and the first review says:
> I have cancer, have not treated it yet but I've started with these. Easy to use, clean fresh product
A few reviews down:
> THE BITTER THE BETTER! And they really are! People need to be more educated about the benefits of the BITTER apricot kernels! THEY MUST BE BITTER in order to kill and prevent the cancerous cells in your body! All you need is 2 kernels a day!