Wrong.
Morrissey is singing about someone 'purportedly' being around 50 to 60, and singing on stage still, and perhaps making a fo0l of himself, when compared to this singers former days. This might be 'mean spirited', but he is using fact and his own opinion. Granted, this could border on disrespect, but at least he has an argument.
This is a valid argument; that maybe it is time to let the past go, and move on. A move, Morrissey, to some, unfortunately hasn't taken his own, earlier sung about, advice.
Morrissey's point in this song, is not solely singing about this 'person' being old. He is singing about him being 'old' and continuing to perhaps live in the past. He is making a connection, whether right, or wrong, about aging and the continuance of profession.
What I am arguing against, is the people who are just trashing Kirk Douglas because he made it to the age of 100. Plastic surgery comments? Really? Kirk Douglas isn't trying to make movies from the 60's in his 100's. He was just celebrating a well-deserved milestone birthday of a 100. There is no reason to be disrespectful towards that. There is absolutely no justification for it. It's just being mean.
Nice try, though. Why don't you register, so your ridiculous rebuttal can be attributed to a 'person', instead of hiding behind 'anonymous'.