I kind of hesitate to judge TP or Prince in these instances. (There is always personal responsibility.)
It seems that entertainer types, who have a completely different life than us mortals, who have the means, rely/should rely more on competent doctors to guide them. IMO, most of us would not have Fentanyl and some other RXs at our disposal. This assumes they were under the care of a dr. Some of the responsibility falls on them (the doctors) and the people around the patient.