He didn't "need" medical attention, he was given one anyways. Are you telling me Zoro would have died if he didn't receive 'medical attention"? Is Hiyori a doctor and can perform life saving surgeries? What are you basing that on?
This is called
needing medical attention
Getting stabbed on top of eating poisonous food for days (one bite of which nearly killed Beppo) took a toll on Zoro and he passed out for few hours. Few hits from Apoo had Luffy decapitated
Zoro got bandages because it was convenience. Before you go running around calling other people fanboys, take a look at yourself.