Tbh if it's just the left arm then Oda write another bullshit ability with no quality whatsoever.
Fuck Hawkins anyway.
The opposite, actually
Even tho I hate Hawkins straw ass for how he's behaving with Kidd/Killer (is getting worst than Apoo, ngl) Oda made a good point of how insidious and sly Hawkins is.
Lot of people were like
when Killer decided to stop and fight him but that's because Killer is one of the few from the Alliance side who can beat him.
Put Zoro on Killer's spot and Luffy on Kidd's place spot and either Zoro or Luffy die.
Same goes for the other SHs.
The fighters who can beat Hawkins game are Killer, Law, Inu and Neko.
Everything I wrote Is based on the assumption that the left arm is the key.
Aldo, this fight Is Oda's way to characterize Killer as the real impersonification of the First Mate/Vice Captain and also to showcase how streetsmart he is (he already gave us a taste with Apoo and Kaido)