AOG - "Why this contestant posting on the deaths of certain celebrities sad and tragic as they may be ..."
simply because celebrities, by definition, are known to a lot of people, and their death will mean something to those who have seen and / or admired their work, as in the case of R L-P.
That is not to infer that the loss of someone not at all famous is any less tragic - but neither is it to infer, as your post seems to, that this lady's death is more tragic because of her circomstances.
All bereavements are sad for those involved as you say - which rather negates the point of your post.