LOL I thought that swedish people are very smart but i guess i was wrong

You used the most ridiculous example to compare Ogbonna's transfer when u compared Pogba's current position in team and possible Ogbonna's after arrival but ok let's play ur game:
Pogba - was signed on free transfer, 20 years old, one of the most promising youngsters in football world, 4th choice central midfielder
Ogbonna - 14m + 50% of the rights on Immobile, 25 years old, had pretty average season with Torino, you can't call him young and promising anymore, could become 7th player after Chiellini, Barzagli, Bonucci, Caceres, Peluso, Marrone who can be used as LCB/CB/RCB, as for LWB - at first he is bad as LB/LWB, at second we have Peluso, De Ceglie, Asamoah, Padoin, Giaccherini, Caceres who could play there
Keep telling me about injuries.