Are you sure? In 2001 Zidane was arguably the best player in the world while Juve were top dogs both on the field and financially. Still, we decided to sell him. Madrid who bought him from us had smaller revenue than us back then. I'm open to hear your interpretation though
I thought we were talking about the 80's but ok i will go along with you on this as i see you being stubborn...
So lets talk about early 2000's Juventus, the time Zidane was sold.
We did not sell Zidane to make a profit, we sold Zidane because he lost motivation whilst being a great opportunity for Juventus to rebuild the squad after a couple of rather unsuccesfull seasons, dont forget the season he left we finished runner-ups in the league while being irrelevant in Europe...
I guess you comparing our current strategy as being similar to the one in the early 2000's which is definately not the same as the current market is way different and the strategy is a way more conservative one right now.
On another note, Baggio as an example was sold as we had the best replacement everyone could ask for back than which was Del Piero, so again is a different story.
In general, we used to keep all our main stars and would only let some of them go if we had a better or at least equal replacement coming up...