I think you both need to look at this from City's perspective. It's undeniable that City are in deep negotiations with both Wolfsburg, and De Bruyne, regarding a transfer. Why would this be if Wolfsburg needed the player, didn't want to sell, and couldn't find an adequate replacement? Equally, why would this be the case if De Bruyne hadn't indicated, pretty strongly, that he desired a move to City?
It seems pretty clear that, for City to have been involved in this deal for the length of time they have been, that we have received the steer from both the players camp, and the Wolfsburg camp, that there is a desire to let this deal happen. Stating that Wolfsburg won't sell, or that they won't sell if De Bruyne doesn't hand in a transfer request, is simply ignoring what must have been discussed behind closed doors. Simply put, there's no way City would still be involved in this deal if we hadn't been told there was a very good chance of it happening.