Well I don't disagree with that, but we need to also remember that the authors of these health research articles ALSO are motivated by making a case that they should get more funding to do more studies.
I was trying to find out more details about the study about calcium+D being associated with more strokes and I found a paper about Calcium supplementation that seemed like it was being even-handed and it concluded that although there are studies showing benefits of increased calcium there are other studies showing adverse effects therefore more research is needed.
Then I tried to compare one of referenced benefit study to one of the referenced adverse effect study, and it was kind of funny, the 'benefit' study showed 30% and better reduction in colon cancer while the 'adverse' study showed...wait for it... increased constipation for one type of calcium supplement! So let's see...less cancer versus constipation for a type of supplement that could be avoided by using a different type of calcium supplement...sure, obviously needs more research funding, ha ha.