Emotions aside, this makes sense for both clubs. They get a top talent, we get a top player.
Bonucci won't move the needle defensively, but he will offensively. Lacking an extra playmaker in defense along with bad FB play killed us last year. We addressed all those issues with this move + Cancelo + Sandro playing like he can.
As a fan I don't like it, I would never do it, but as someone who is guilty of judging every team, every player based on how they do in CL I can't be mad. Bonucci is a proven commodity and fills a hole we had in our tactics last year. He is a win now move and Agnelli cares about winning only.