yeah, he always missed sitters. It did help his career though that he played in the teams where strikers always thrive - Ajax and Napoli - teams which play offensive football and create many chances.
Some might argue that he is just a sub to Vlaho, but why spend 2m fee + around 3m net salary for a guy who is probably not better than Kean - another few millions flushed down in toilet. Not even mentioning that he will probably be unavailable for at least 5-10 games due to muscle injuries.
This only makes any sense if we get rid of Kean, every other scenario is a big no.