1. Dumb logic. Luffy could have assisted the scabbards agaisnt kaido but did not do so because that's how oda wrote it. Infact oda is going out of his way to handy cap coby from currently assisting (possibly seastone cuffs hence why people are point out not being able to break it, not eating for days being exhausted etc).
2. So your entire point was mute since regardless koby moves the plot lol.
3. Koby being captured had nothing to do with aokiji. Aokiji said to bb you can't use him. And bb won't be able to benefit from having garp since the man power to have him captured endangers his crew. Which means he would have to kill garp which means he won't benefit from it. Infact apkijis only concern is making sure koby remains captured and is not actively trying to pursue garp if he packs up and leave lol
Luffy didn't assist cause it was their right to start the fight. And Luffy still went and fought and beat kaido too.
Will Coby in any way be able to help Garp against Aokiji? No chance lol.
Seastone handcuffs are just your copium for Coby not being able to even break normal handcuffs lol.
Coby isn't significant to the current plot is my point. He was the arc princess to start the plot. But he is not gonna be in the fight. Just like any arc princess.
Do you think Coby won't escape? He will. And garp either gets captured or killed. So cobys involvement in the arc will have been getting captured and getting rescued. Nothing more.
Other characters are the people that moves the plot forward. Not Coby.
If Coby was strong enough to fight BB with Luffy, or even a commander of BB, then he would have been able to escape on his own. Not be released by perona lmao.
If perona hadn't come, Coby would still be imprisoned. That's not a character whose gonna fight BB or Aokiji lmao.