(a) He's 20, look at the goal records at that age of Ibra, Costa, Drogba, Kane (as mentioned) and lots more; (b) his goal/minutes and g/a/minutes record is actually pretty good, with half those appearances being 20 mins here and there; (c) for people claiming only we'd pay this kind of money, Napoli paid a similar price for Osimhen in the French league with a not especially spectacular scoring record, and in a slightly 'less inflated market; (d) related to that, it's not about current scoring rates, but about potential, which also relates to short and longer-term contribution - there are strikers with higher scoring numbers but whose physical attributes and general style means they have a lower ceiling of effectiveness...
Obviously it's a risk, but working within the 'gravity' of our non-City budget, and Levy's attitude to sell Kane, who is this guaranteed finisher who can also play within PL's intensity and in ETH's style that we should have signed instead?