Inclined to agree but on the other hand, there is an argument to be made of 'if we sack manager A, is there a good/suitable manager out there to replace him?'.
With Sarri, that is debatable. There were several times he was reportedly on the verge of being sacked but always ended up avoiding it because we picked up a win at the right time. And while we don't know if the club would have stuck with him if Juventus hadn't come calling, they didn't exactly fight tooth and nail to keep him, did they? Plus, the fan unrest may have influenced the board's decision to hire Lampard instead of someone like Max Allegri.