I think it is well to consider, in the light of this unfortunate occurrence, the two different kinds of risk that accompany solo travel. The first is risks that you, the traveler, accept for yourself. You decide that the added risk to life and limb that traveling alone in the wilds presents is worth it to you in order to have the experience that it provides. I might add that this is not a simple equation - solo=more risk. A person might be safer traveling solo in some situations compared to traveling with companions who they are responsible for and who does not have their level of experience or competence.But generally, solo is riskier.
The second is the risks that you ask others to accept for you. The worry and perhaps grief that your injury or death may bring to family and friends; and the risks that will be taken by those who search for you. It is these secondary risks that I find the most troubling in my own considerations of going alone. If I were still single and childless, and could be assured that if I was lost no one would come looking for me and risk their own safety to do it, then I could feel that it was all my risk. But Since I am married and have kids and since I know that I will be searched for even if I tried to arrange that I would not be, I feel differently.
These secondary risks have led me to decide that I have an obligation to those at home and those who would come looking to carry a PLB, for their sake. I realize thee are situations where it wouldn't matter - if I fall and die it won't matter what I am carrying - so it's not perfect but there it is.
Everyone has to consider the risks and decide what they want to do. I just think it's important to be aware of the risks that you take for others as well as those you take for yourself.