I think this undersells how big it would be for the squad to have him do it.
Barca and Real players talk about how at their best the whole team went up a level because they simply believed they'd win because they had Messi/Ronaldo.
Haaland can be that player for us, and the way those legends and mythologies are built is by these kind of heroic record breaking actions. Smashing the goals record, European golden boot, first player in the 70 year history of the European Cup to score 6 in a game.
A lot of our CL eliminations come down to the players seemingly doubting themselves or not having the belief they can overcome going a goal down or missing a big chance or a bad decision going against us.
IMO it's a shame. Not a massive deal, nothing to throw toys out of the pram or taint a glorious evening, just hopefully he doesn't do it again if the chance comes around again.