The previous conversation was by no means just to expose and humiliate Hector for his own satisfaction. Kain was not that shallow.
To be more precise, the hunt had begun the moment the hulking fool Hector entered his sight, and the hunter's trap had been set the moment Kain spoke his first sentence.
"The moment the prey desperately ran down the escape route designated by the hunter, it died."
With just a few words, Kain exposed Hector's innermost secret, causing his elated mood of becoming a hero to plummet to the abyss.
There are moments when human psychology is much weaker than we imagine. Especially for Hector's type of mentality.
He was very insecure about himself, so his strong shell appeared to hide his weakest side. On top of that, he was also a dreamer, which caused everything that came to him to be exaggerated to some extent, both good and bad.