I feel that Oda may not be able to explain this problem anymore, because each step of the plot development gives us a new understanding of Yamato's strength. At the beginning, Kaido asked The Six to catch Yamato, and whoever caught it had the opportunity to challenge the three plagues. Yamato's first appearance from Runti's rescue and flying, giving people the feeling that she is also in the same grade as Fei Liu, although she will use Kaido's thunderous gossip, she always feels much weaker. Later, in order to protect Momonosuke, he encountered Triceratops, one of the flying six, and he was not afraid of Yamato. At this time, they all thought that Yamato himself was not capable of unshackling the handcuffs, and Luffy also used the external release method to directly unscrew the handcuffs without triggering the detonation device after realizing Reilly's level of domineering. See here everything is still normal.
The real problem is in the decisive battle on the roof, after Luffy was beaten into the sea by Kaido, Yamato appeared in a one-on-one contest with Kaido, Kaido maintained the dragon man form, spitting and thundering gossip powerful moves were used, Yamato one by one to deal with, the same as the same moves, and even domineering, Yamato was only slightly inferior. Kaido, who was fully committed, could not take Yamato in a short period of time. Is this strength still handcuffed for fear of explosion? The handcuffs Yamato was wearing definitely did not have the composition of the sea tower stone, and if she had it, she would not be able to easily knock Runti unconscious. Yamato is also a demon fruit power, the esper species Oguchi Makoto, and the guardian dog god of Japan. With such a strong strength and the super resilience of the animal system, Yamato Root does not need high-end skills to crack the handcuffs, and directly letting it detonate will not cause multiple damage to itself.
Why is that? The more the end of the Wano kingdom chapter, the more Oda could not hold back, and he could not take care of some unimportant details, and could only do everything for the needs of the plot. Luffy couldn't let him Kaido have a gap, and arranged for others to drag Kaido, just when The role of Yamato was not used, it was arranged here. There were inconsistencies, otherwise think about Yamato's slightly weaker strength than Kaido's, and how Dare Kaido's men dare to stop Yamato.
Exploding handcuffs is nothing new, the last chapter Yamaji wore it to prevent him from escaping marriage, Yamaji was just an ordinary flesh and blood body at that time, able to trap him to say it. Earlier, the Chambord Islands Slave Auction House was locked on the neck with an explosive collar, and the explosion range was not large, because it was locked in such a key position as the neck, so the slaves did not dare to break free, and they would be killed if they tried. To the kingdom of Peace Kaido restricted his daughter to use this thing, from the beginning there were fans who knew that this thing was useless to the master, and Oda's arrangement was nothing more than to create a condition for Yamato's encounter with Luffy to quickly trust.
Text: Dragon Knight Sharu