Exactly, Haaland was a goal machine before joining City, hell even before joining Dortmund. What problem was signing Zirkzee addressing?It's not their age that is the problem... Zirkzee is not a prolific player, he isn't now and he won't be in 10 years.
Haaland scores for fun and he's only a year older and he has scored for fun since he was young.
The right profile of player scores regardless of their age.
You could say Hojlund was the right profile, but again, he never had a great scoring record prior to joining United, so his current record shouldn't be surprising.
We needed a proven goal scorer as much as we needed new CBs.