They don't need to be, they won, what, 4-5 out of the last 6 PLs? They're just different with Haaland. They weren't exactly pulling trees last season either if I remember until they turned it up? Or maybe it's the season before that I'm confusing with.
I don't think Haaland is a flat-track bully though, he scored against big teams in the past, but I do think defenders and managers will learn better ways to neutralize him and he's not capable of scoring a goal on his own when the team is out of ideas and the opponent box is full of defenders. That's why, for as brilliant of a goal scorer as he is, I kind of roll my eyes at people who claim he's the best player in the world or even better than Benzema as a CF, or Mbappe as the best young player. He might get there, but I have a hard time seeing him develop the tools to be a game-breaking player that can affect the game on his own. I also don't really think he needs to. He will set himself up to be in teams that will focus on creating the chances for him and he'll put them away at a world-class level the likes we haven't seen. That's good enough for me.