Antonio Conte system heavily depends on strong striker like Romelu Lukaku to score goals which can be big problem in Premier League if that player is not performing well. You are right that coaches need to find other ways to score especially against defensive teams because relying on just one player makes team easy to stop. Geat coach must be flexible and use skills of all their players not just striker.
Yes, true, but is he wrong? With him, Romero Lukaku (and not Romelu) is at his best, and Antonio Conte has a crucial piece for his strategy. They seek each other out, and it seems to me he's proven himself to be a good professional, albeit somewhat mercenary.
Honestly, i don't know if i would want him on my team.