This study was foolish at the least, and really rather reckless given the physical condition of the test subjects. At that age, and in that condition, you have already done permanent damage, almost always irreversable, and with the stress and high dose of testosterone I am suprised they didn't kill more people.
Also, anytime you see words like "The days of testosterone as an anti-aging drug are over" tied to a study, rather than a non-biased "Testosterone on very elderly, in terrible shape, at a high dose produces serious side effects" you know the persons/entities responsible for the article are indeed biased. There are far too many studies that show benefit, of course there are always risks, all medications have risks associated with them. One day it may indeed be possible to create a drug that affects all persons the exact same, but that day is not here, and given genetic and biological differences from person to person it is nearly impossible to do so.