Of course, really.
The footballing standard by which a main man is measured is output in goals and assists. So since you say Kvara is the main man in Napoli, despite having an inferior output, you have to explain how you arrived at that assessment.
Even when you consider output it's clear that Osimhen is being held back by not taking penalties, despite winning a lot of them, which Kvara then takes--which is unusual for a striker of his profile, chasing the golden boot in their league.
So:
A. Considering that Osimhen is by far the bigger contributor to open-play goals, I'd ask again, by which metric is Kvara the main man?
B. Do you think that opinion is shared on the streets of Naples?