In my opinion, cockfights are really incredibly cruel to animals and are a disgusting spectacle. But the most important thing is that they corrupt human morality. After all, it is legalized murder and mutilation, even if we are talking only about roosters. You know, I read about millionaires who amused themselves by organizing fights of homeless people. We can also remember the ancient risky organizers of gladiator fights. There, gladiators fought criminals, wild animals. In addition, the organizers pitted many wild animals against each other, trying to create bloody scenes that would tickle the nerves of spectators. Fortunately, we do not see gladiator fights now, since moral progress does exist. I hope that cockfights will also become a thing of the past someday.
I understand your point since you're not used to watching this kind of activity. But for us who are already accustomed to this kind of gambling, we no longer see the cruelty toward the animals. It's probably similar to the cruelty experienced by elephants in circuses, since performing there isn't really their will either.