So she couldn't have gone to the funeral and done the concert? All I'm saying is, if she was well enough to do a concert, she was well enough to go to Whitney's funeral, and she should have been there.
I can see you've never performed for 90 minutes to several hours at a time. It's exhausting to performers half AF's age. (Why do you think drug use is so common among performers? There are a variety of reasons, but one of them is the need to be "up" for hours at a time in addition to traveling, day after day, while on tour.
I'm sorry, but you can't possibly know what a 70-year-old woman with a history of cancer and other infirmities has the stamina to do. The drive to Newark would have taken 30 minutes to an hour each way (depending on traffic) and the funeral itself was over 3 hours.
I have no idea how many performances AF gave last week, but I do know she was interviewed by numerous media outlets.