A top striker who would create fear in defences would give a serious focal point in our attacking.
Lets be honest Jesus coming deep, playing with his back to the goal a lot and being offside quite often while not a clinical top class finisher when he has some chances he aint someone who are making defenders having nightmares.
If we had someone just like Vardy couple year back, or Kane who are both dominant strikers can win headers in the box, can score from outside the box, can be fox in the box etc.
(Let alone Haaland....)
We have Kun who is on the decline for obvious reasons, he aint have much left at top class football, and his injuries seemingly stop him to get 100% fit for months now.
Even if Kun can deliver 90 minutes for us soon we can safely say that he will not be a 100% top of ability neither fitness wise. I think he is going down the same route as Kompany, still world class but his body is just struggling to stay fit or even get 100% fit.
We tried Sterling, Mahrez, Torres in central forward role recent months, none if them are really good there. Neither is Jesus imo, a striker in our system could flourish but Jesus is not the guy who will deliver 20+ goals in PL for us. Kun also is not that guy anymore unfortunately given his fitness issues.
Having a top class finisher who instill fear in defences could give more confidence to wide players, midfielders even full backs to create more chances for him, while could take extra focus from opponents freeing up focus for others.