that's a good point and it is absolutely true. strikers will always miss chances.
the difference is the conversion rate and shooting frequency. last time i checked vlahovic had a conversion rate of below 20% (~17% iirc). for comparison, last season haaland had a conversion rate of ~50% (this season he's closer to 20% too though). even isak was well above 40%.
watch this and try not to pull a guardiola on yourself:
this is the only deal breaker with vlahovic:
https://www.kickest.it/it/serie-a/statistiche/giocatori/big-chance-fallite - 10 big chances missed
https://www.kickest.it/it/serie-a/statistiche/giocatori/big-chance-fallite/2023-2024 - 17 (!!!)
https://www.kickest.it/it/serie-a/statistiche/giocatori/big-chance-fallite/2022-2023 - 9
that's 36 in the last 3 seasons (and counting), only considering league matches, in a team that has not had a shitload of chances. i don't mind him not scoring screamers on a weekly basis, i really don't expect anyone to do that. but when you face the goalie only and/or an open goal, you have to bury those with a higher efficiency.