Gyokeres hasn't even played in the PL he was like 21 when he was at Brighton.
Not everyone has the same career trajectory, pretty much as soon as he started playing regularly he's been putting up numbers both in the championship and in Portugal.
Now I'm not saying it's a guarantee he comes and does the same in the PL, but its not like anyone's is putting up even clise to the numbers like him as a 9 in the PL other than Haaland/isak.
We really need someone to take the 9 away from Kai and sesko isn't that, at least not straight away, that's my fear with that signing. It will improve the depth but it doesn't take us up a level, as he probably just shares minutes with him rather than replace him.