That's an industrial-grade bullshit. He doesn't need Miretti and Fagioli in midfield since he has far superior talent there. His problem is at the CF position where Immobile flopped and Belotti is meh. He's shown that he doesn't shy away from giving youth a chance, like he did with Gnonto.
Chiesa bailed him out in Euros a few times when strikers didn't seem to be able to score, but he wasn't available. Even with all that if Jorginho scored that penalty Italy would be in the world cup.