If I'm not mistaken Sky only reported that there are ongoing negotiations so it's not the same as he's gone already.
I'm also not denying there's an interest from Bayern in Vidal. I just think the player's willingness to leave might triggered the whole thing. If we were to believe that Juve turned down previous offers for Vidal from Arsenal, United and Real and 80 mln for Pogba this is a strong statement that we do not intend to sell important players. Now all of a sudden we and Vidal would accept Bayern's offer. Weird if You ask me.