As I said previously, his death is just an example of shitty writing. Same thing happened to Cursebeard. They’re both characters given overwhelming power in the plot, but when Vetex realizes “oh shit they kinda make this story’s main issue easily solvable”, they’re both killed in the most goofy ways.
Realistically, fine I could see Morock needing to die the way he died, he’s been described as a pretty righteous person who was trying to get rid of the AG because he saw them (or atleast their past) as inherently bad to the people of the Seven Seas. But Cursebeard dying the way he did was goofy as shit.
Both Cursebeard and Morock were done dirty by the plot.