Obviously they are facts. They left Juventus and joined another team. Doesn't mean there aren't all sorts of differing reasons why players are sold. These are humans with different emotions, flaws, career paths. A number of them are considerably uneducated. They aren't stock or robots that are just moved around when you please.
Morata - either had the clause or he stayed there or went elsewhere for more money.
Pogba - moneydab wanted to go back to Manchester, world record fee. Better than flat out refuse him and Raiola and watch the fee go down until United have us bent over a table, with unknown consequences on the field.
Vidal - take your pick of the reasons. It certainly wasn't a technical choice because he was class. For me the off-field shit mixed with mutual interest between Bayern and Vidal was the reason for the swiftness and lower fee. That is how Juve have dealt with players in this situation before.
Tevez - family, same reason he went to China.
Pirlo - the guy was semi-retired, it's a joke he is even mentioned as a filler in these lists. Who next, Evra?
Too many of us grew up watching a time when players stay for years. They don't now, and it's getting worse all the time. We treat players with professionalism and respect and expect it back. Foreign investment, foreign players, they don't care about staying here for 10 years or until retirement.
Until we become the #1 or maybe #2 desirable club then there will always be the idea that the grass is greener. Even if you are #1 in that list there is still the possibility of wanting to move and various reasons for that. And maybe this is a reality check but Juventus is never going to be in that position.