Biomedical research isn't easy, even though the current rate of progress often makes it seem so. This article from SFGate reminds us that for every success we read about, there are a dozen failures lurking in the wings. I don't think that the author's conclusions are necessarily valid - stem cells are notoriously hard to work with at this point in time. Reports earlier in the month indicated other side effects and difficulties in trials using stem cells to repair heart disease. This is all part of the learning process. You don't abandon scientific research because you aren't getting perfect results right now.