There is not a single striker in the world right now that can replace Haaland. As good as Alverez is, he couldn't do it.
I beg your pardon. Say that again? 
Last season, he wasn't even in the top 5 in the European Golden boot race, and you say he is irreplaceable? Maybe we are watching different leagues!
Truth be told, Last season was not good for him and if that continues even into the coming season, they will start to think twice about Benching/replacing him.