What happened is Gundogan was coming after a good season at City as a false 9 so to speak, he was free agent, we took the chance as we could move him quickly and get a younger player when funds hopefully got better. As it happened. Sold him and got Olmo.
He cost 20m for that season and was another AM/Box to box when had legs.. in a team littered with them
Gundogan absolutely did not play false nine for City that season what an bizarre lie.
He played beside Rodri with freedom to get up park into the box.
Barca didnt 'sell' Gundo.
All money Xavi spent while not adressing DM.. despite the claim he knew need for it.
The rational for signing him is irrelevant.
The point is they decided that being more important than a DM.