It is good to see the MC struggle, but the problem is that showing Luffy struggle a bunch of times without actual consequences (such as fucking up the plan, making him damaged permanently or something) gets boring real fast, if you consider the fact that Kaido has fucked up Luffy, Zoro and all the Scabbards, but they are all getting healed and back up already fucking sucks, because it takes away any fear for Kaido actually hurting them, because he can never finish the deal, so if we see someone getting fucked by Kaido, then we know they will be just fine given time.
Let's hope this KO on Luffy has a lot more impact.