No this song is definatly about being a music icon or "celebrity". When they sing about getting a 9-5 job its them saying hey it either this or we are gonna have to work behind a desk. When he speaks of stuff he will miss its kinda him talking about the freedoms and non-responsibilitys he had before becoming a celebrity. That is pretty clear in the last line of that verse when he says "i'll miss the boredom and the freedom and the time spent alone" because as a celebrity it seems you get none of that (I'm not a celeb and really wouldnt know but I'm just guessing)
When he sings of getting divorced from the models and finding another its pointing out how with fame you lose the ability to find true love almost. And then finally the death of a rockstar. To me the title "time to pretend" kinda means that as a celeb or rockstar you just gotta pretend that you have lived a incredible life when in reality you just haven't. You have the girls money and the drugs but are you really happy, like you were when you were a kid and didn't have a worry in the world.
Sure many others have said what I have just said but had to explain to the person below me right quick.