As usual, you employ specious reasoning to come to a conclusion that no direct fault can be attributed to Pitino. Perhaps you don't understand the difference between decision making in a civil or criminal trial and an evaluation of coaching. When evaluating a multi-million dollar coach, the standard is "the results speak for themselves."
No one is asking these questions about Fran McCaffrey, who lost one player from last year's team to the NBA, two more to transfer (one to Kansas), his best long-range shooter to injury, his highest rated freshman to sickness, and another player to injury who was one of only 3 scholarship big men on the roster. McCaffey has 8 active scholarship players on his roster and only two of them are taller than 6'6". Nevertheless, his team has a 15-6 record, with 6-4 in conference, and is ranked.
Pitino doesn't have to be "guilty" of any particular wrongdoing to lose this job. His teams just have to perform fairly consistently below their peers, which they have done throughout most of his tenure.